Wakefield accused of fraud

Studies looking at measles, mumps and rubella (MMR) vaccine:
Lack of Association Between Measles-Mumps-Rubella Vaccination and Autism in
Children: A Case-Control Study
Budzyn D, et al. The Pediatric Infectious Disease Journal. Vol. 29, No. 5, May 2010
Researchers in Poland compared vaccination history and autism diagnosis in 96
children with autism, ages 2 to 15, as well as 192 children in a control group. For
children diagnosed before a diagnosis of autism, the autism risk was lower in children
who received MMR vaccine than in nonvaccinated children. A similar result was
achieved for the single-antigen measles vaccine.
AUTHOR CONCLUSION: The study provides evidence against the association of
autism with either MMR or a single measles vaccine.
http://www.ncbi.nlm.nih.gov/pubmed/19952979


Lack of Association between Measles Virus Vaccine and Autism with Enteropathy:
A Case-Control Study
Hornig M et al., PLoS ONE 2008, 3(9): e3140 doi:10.1371/journal.pone.0003140
Researchers looked for measles virus in the guts of 25 children with both autism and
gastrointestinal disorders, and another 13 children with the same gastrointestinal
disorders but no autism. The virus was detected in one child from each group.
AUTHOR CONCLUSION: This study provides strong evidence against association
of autism with persistent measles virus RNA in the gastrointestinal tract or with
measles, mumps and rubella (MMR) vaccine exposure.
http://www.plosone.org/article/info%3Ad ... ne.0003140


Measles Vaccination and Antibody Response in Autism Spectrum Disorders
Baird G et al., Archives of Disease in Childhood 2008; 93(10):832-7
Case-control study of 98 vaccinated children aged 10-12 years in the UK with autism
spectrum disorder (ASD) and two control groups of similar age: 52 children with
special educational needs but no ASD and 90 children in the typically developing
group. No difference was found between cases and controls for measles antibody
response. There was no dose-response relationship between autism symptoms and
antibody concentrations.
AUTHOR CONCLUSION: No association between measles vaccination and ASD
was shown.
http://tinyurl.com/dn6yy8


MMR-Vaccine and Regression in Autism Spectrum Disorders: Negative Results
Presented from Japan
Uchiyama T et al. Journal of Autism and Developmental Disorders, 2007; 37(2):210-7
Study of 904 patients with Autism Spectrum Disorders (ASD). During the period of
measles, mumps and rubella vaccine (MMR) usage, no significant difference was
found in the incidence of regression between MMR-vaccinated children and nonvaccinated
children. Among the proportion and incidence of regression across the
three MMR-program-related periods (before, during and after MMR usage), no
significant difference was found between those who had received MMR and those
who had not. Moreover, the incidence of regression did not change significantly
across the three periods.
AUTHOR CONCLUSION: The data do not support an association between MMR
and autism.
http://tinyurl.com/6c6o4r


No Evidence of Persisting Measles Virus in Peripheral Blood Mononuclear Cells
from Children with Autism Spectrum Disorder
D’Souza Y et al. Pediatrics 2006; 118(4):1664-75
Peripheral blood mononuclear cells were isolated from 54 children with Autism
Spectrum Disorders (ASD) and 34 developmentally normal children, and up to 4 realtime
polymerase chain reaction assays and 2 nested polymerase chain reaction assays
were performed. No sample from either ASD or control groups was found to contain
nucleic acids from any measles virus gene. In the nested polymerase chain reaction
and in-house assays, none of the samples yielded positive results. Furthermore, there
was no difference in anti-measles antibody titers between the autism and control
groups.
AUTHOR CONCLUSION: There is no evidence of measles virus persistence in the
peripheral blood mononuclear cells of children with ASD.
http://tinyurl.com/dcb79o


Immunizations and Autism: A Review of the Literature
Doja A, Roberts W. The Canadian Journal of Neurological Sciences 2006; 33(4):341-6
Literature review found very few studies supporting an association between vaccines
and autism, with the overwhelming majority showing no causal association between
the measles, mumps and rubella (MMR) vaccine and autism. The vaccine
preservative thimerosal has alternatively been hypothesized to have a possible causal
role in autism. No convincing evidence was found to support an association between
the vaccine preservative thimerosal and autism, nor for the use of chelation therapy in
autism.
AUTHOR CONCLUSION: With decreasing uptake of immunizations in children and
the inevitable occurrence of measles outbreaks, it is important that clinicians be aware
of the literature concerning vaccinations and autism so that they may have informed
discussions with parents and caregivers.
http://tinyurl.com/ddnqq7


Pervasive Developmental Disorders in Montreal and Quebec, Canada: Prevalence
and Links with Immunizations
Fombonne E et al. Pediatrics. 2006; 118(1):e139-50
Study of thimerosal and measles, mumps and rubella (MMR) vaccine uptake in
28,000 Canadian children born between 1987 and 1998, of whom 180 were identified
with a pervasive developmental disorder.
AUTHOR CONCLUSION: The data rule out an association between pervasive
developmental disorder and either high levels of ethyl mercury exposure comparable
with those experienced in the United States in the 1990s or 1- or 2-dose MMR
vaccinations.
http://tinyurl.com/5c27nu

Is there a ‘regressive phenotype’ ofAutismSpectrumDisorder associatedwith themeaslesmumps-
rubella vaccine?ACPEAStudy
Richler et al. Journal of Autism and Developmental Disorders. 2006
A multi-site study of 351 children with Autism Spectrum Disorders (ASD) and 31
typically developing children used caregiver interviews to describe the children’s
early acquisition and loss of social-communication milestones. For the majority of
children with ASD who had experienced a regression, pre-loss development was
clearly atypical.
AUTHOR CONCLUSION: No evidence that onset of autistic symptoms or of
regression was related to measles, mumps and rubella vaccination.
http://tinyurl.com/66gtk2


Relationship between MMR Vaccine and Autism
Klein KC, Diehl EB. The Annals of Pharmacotherapy. 2004; 38(7-8):1297-300
Ten articles that specifically evaluated the possible relationship between the measles,
mumps and rubella (MMR) vaccine and autism were identified. Review articles,
commentaries, and evaluations of a link between gastrointestinal symptoms in autistic
children and MMR immunization were excluded.
AUTHOR CONCLUSION: Based upon the current literature, it appears that there is
no relationship between MMR vaccination and the development of autism.
http://tinyurl.com/chdjrk


Immunization Safety Review: Vaccines and Autism
Institute of Medicine, The National Academies Press: 2004
The IOM's Committee on Immunization Safety Review was convened in the fall of
2000 to provide an independent review of increasingly prominent vaccine safety
concerns. The 15 committee members with expertise in pediatrics, internal medicine,
immunology, neurology, infectious diseases, epidemiology, biostatistics, public
health, risk perception, decision analysis, nursing, genetics, ethics and health
communications analyzed over 200 relevant studies.
AUTHOR CONCLUSION: The committee rejected a causal relationship between
the MMR vaccine and autism as well as a causal relationship between thimerosalcontaining
vaccines and autism.
http://books.nap.edu/catalog.php?record ... escription


No effect of MMR withdrawal on the incidence of autism: a total population study
Honda H et al, Journal of Child Psychology and Psychiatry 2005 June; 46(6):572-9
Study examined incidence of Autism Spectrum Disorders (ASD) to age 7 for children
born between 1988 and 1996 in Yokohama, Japan. The measles, mumps and rubella
(MMR) vaccination rate in Yokohama declined significantly in the birth cohorts of
years 1988-92, and no MMR vaccines were administered in 1993 or thereafter. In
contrast, cumulative incidence of ASD up to age 7 increased significantly in the birth
cohorts of years 1988 through 1996 and most notably rose dramatically beginning
with the birth cohort of 1993.
AUTHOR CONCLUSION: MMR vaccination is not likely to be a main cause of
ASD, and cannot explain the rise over time in the incidence of ASD. Withdrawal of
MMR in countries where it is still being used cannot be expected to lead to a
reduction in the incidence of ASD.
http://tinyurl.com/d8f3lg


No evidence for links between autism, MMR and measles virus
Chen W et al, Psychological Medicine 2004 April;34(3):543-53
Study compared 2,407 persons with autism born between 1959 and 1993; to 4,640
Down syndrome subjects born between 1966 and 1993.
AUTHOR CONCLUSION: No increased risk of autism was found following
exposures to wild measles and vaccinations with monovalent measles, and Urabe or
Jeryl-Lynn variants of measles, mumps and rubella (MMR) vaccine.
http://tinyurl.com/5msou2
Age at First Measles-Mumps-Rubella Vaccination in Children with Autism and
School-Matched Control Subjects: A Population-Based Study in Metropolitan
Atlanta
DeStefano F et al. Pediatrics 2004; 113(2): 259-66
Study compared ages at first measles, mumps and rubella (MMR) vaccination
between children with autism and children who did not have autism in the total
population and in selected subgroups, including children with regression in
development.
AUTHOR CONCLUSION: Similar proportions of case and control children were
vaccinated by the recommended age or shortly after (ie, before 18 months) and before
the age by which atypical development is usually recognized in children with autism
(ie, 24 months).
http://pediatrics.aappublications.org/c ... /113/2/259


MMR Vaccination and Pervasive Developmental Disorders: A Case-Control Study
Smeeth L et al. Lancet 2004; 364(9438):963-9
Matched case-control of 1,295 people born in 1973 or later who had first recorded
diagnosis of pervasive developmental disorder while registered with a contributing
general practice between 1987 and 2001. Controls (4,469) were matched on age, sex
and general practice. 1,010 cases (78.1%) had measles, mumps and rubella (MMR)
vaccination recorded before diagnosis, compared with 3,671 controls (82.1%) before
the age at which their matched case was diagnosed,
AUTHOR CONCLUSION: Data suggest that MMR vaccination is not associated
with an increased risk of pervasive developmental disorders.
http://tinyurl.com/8wlhfj


Prevalence of Autism and Parentally Reported Triggers in a North East London
Population
Lingam R et al. Archives of Disease in Childhood. 2003; 88(8):666-70
Study of reported age of onset of Autism Spectrum Disorder (ASD) among 567
children in northeast London born between 1979 and 1998. The age at diagnosis of
ASD was estimated to have decreased per five-year period since 1983, by 8.7% for
childhood autism and by 11.0% for atypical autism.
AUTHOR CONCLUSION: The data suggest that a rise in autism prevalence was
likely due to factors such as increased recognition, a greater willingness on the part of
educators and families to accept the diagnostic label, and better recording systems.
The proportion of parents attributing their child's autism to MMR appears to have
increased since August 1997.
http://adc.bmj.com/cgi/content/abstract/88/8/666


A Population-Based Study of Measles, Mumps, and Rubella Vaccination and
Autism
Madsen KM et al. New England Journal of Medicine. 2002; 347(19):1477-82
Compared relative risk of Autism Spectrum Disorder (ASD) in children vaccinated
with measles, mumps and rubella (MMR) vaccine and unvaccinated children born in
Denmark between 1991 and 1998. Of the 537,303 children in the cohort, 82% had
received the MMR vaccine. Researchers identified 316 children with a diagnosis of
autism and 422 with a diagnosis of other ASDs. There was no association between
the age at the time of vaccination, the time since vaccination, or the date of
vaccination and the development of autism.
AUTHOR CONCLUSION: This study provides strong evidence against the
hypothesis that MMR vaccination causes autism.
http://tinyurl.com/5eob5k


Neurologic Disorders after Measles-Mumps-Rubella Vaccination
Makela A et al. Pediatrics. 2002; 110:957-63
Study of 535,544 1- to 7-year-old children who were vaccinated between November
1982 and June 1986 in Finland.
AUTHOR CONCLUSION: Data do not support an association between measles,
mumps and rubella (MMR) vaccination and encephalitis, aseptic meningitis or
autism.
http://tinyurl.com/6ybfjr


Relation of Childhood Gastrointestinal Disorders to Autism: Nested Case Control
Study Using Data from the UK General Practice Research Database
Black C et al. British Medical Journal. 2002; 325:419-21
Nested case control study of 96 children diagnosed with autism and 449 controls. The
estimated odds ratio for a history of gastrointestinal disorders among children with
autism compared with children without autism was 1.0 (95% confidence interval 0.5
to 2.2).
AUTHOR CONCLUSION: No evidence was found that children with autism were
more likely than children without autism to have had defined gastrointestinal
disorders at any time before their diagnosis of autism.
http://tinyurl.com/csudoy


Measles, Mumps, and Rubella Vaccination and Bowel Problems or Developmental
Regression in Children with Autism: Population Study
Taylor B et al. British Medical Journal. 2002; 324(7334):393-6
Population study of 278 children with core autism and 195 with atypical autism, born
between 1979 and 1998. The proportion of children with developmental regression
(25% overall) or bowel symptoms (17%) did not change significantly during the 20
years from 1979, a period which included the introduction of measles, mumps and
rubella (MMR) vaccination in October 1988.
AUTHOR CONCLUSION: Data provide no support for an MMR associated “new
variant” form of autism with developmental regression and bowel problems, and
further evidence against involvement of MMR vaccine in the initiation of autism.
http://tinyurl.com/6oqsfc


No Evidence for a New Variant of Measles-Mumps-Rubella-Induced Autism
Fombonne E et al. Pediatrics. 2001;108(4):E58
Study compared 96 children with a pervasive developmental disorder (PDD) born
between 1992 and 1995 and who had received the measles, mumps and rubella
(MMR) vaccine, to PDD patients who did not receive MMR.
AUTHOR CONCLUSION: No evidence was found to support a distinct syndrome of
MMR-induced autism or of “autistic enterocolitis.” These results add to the largescale
epidemiologic studies that all failed to support an association between MMR
and autism at population level. These findings do not argue for changes in current
immunization programs and recommendations.
http://tinyurl.com/5adckj


Measles-Mumps-Rubella and Other Measles-Containing Vaccines Do Not Increase
the Risk for Inflammatory Bowel Disease: A Case-Control Study from the Vaccine
Safety Datalink Project
Davis RL et al. Archives of Pediatric and Adolescent Medicine. 2001;155(3):354-9
A case control study of 155 persons with inflammatory bowel disease with up to five
controls each. Neither past vaccination nor age at vaccination with other MCV was
associated with increased risk for Crohn’s disease, ulcerative colitis, or IBD. Risk for
Crohn’s disease, ulcerative colitis, or IBD was not elevated in the time immediately
following vaccination with either vaccine.
AUTHOR CONCLUSION: Vaccination with MMR or other MCV, or the timing of
vaccination early in life, did not increase the risk for IBD.
http://archpedi.ama-assn.org/cgi/conten ... /155/3/354


Time Trends in Autism and in MMR Immunization Coverage in California
Dales L et al. Journal of the American Medical Association. 2001; 285(9):1183-5
Scientists looked for correlation between increases in the rate of autism diagnoses and
increases in the rate of measles, mumps and rubella (MMR) vaccination in children
born between 1980 and 1994.
AUTHOR CONCLUSION: These data do not suggest an association between MMR
immunization among young children and an increase in autism occurrence.
http://jama.ama-assn.org/cgi/content/ab ... 285/9/1183


MMR and autism: further evidence against a causal association
Farrington CP, et al. Vaccine. 2001; Jun 14; 19(27):3632-5
Data from an earlier measles, mumps and rubella (MMR) vaccine study (Taylor et al,
2000) were reanalyzed to test a second hypothesis.
AUTHOR CONCLUSION: Results provide further evidence against a causal
association between MMR vaccination and autism.
http://tinyurl.com/5lb3w7
Mumps, Measles, and Rubella Vaccine and the Incidence of Autism Recorded by
General Practitioners: A Time Trend Analysis
Kaye JA et al. British Medical Journal. 2001; 322:460-63
Study compared prevalence of measles, mumps and rubella (MMR) vaccination
among children in the United Kingdom to rising prevalence of autism diagnoses for
children.
AUTHOR CONCLUSION: The data provide evidence that no correlation exists
between the prevalence of MMR vaccination and the rapid increase in the risk of
autism over time.
http://www.bmj.com/cgi/content/full/322/7284/460


Further Evidence of the Absence of Measles Virus Genome Sequence in Full
Thickness Intestinal Specimens from Patients with Crohn’s Disease
Afzal MA, et al. Journal of Medical Virology. 2000; 62(3):377-82
Study of specimens of macroscopically inflamed and normal intestine along with
mesenteric lymph nodes from patients with Crohn’s disease. None of the samples
examined gave any evidence of the persistence of measles virus in the intestine of
Crohn’s disease patients.
AUTHOR CONCLUSION: The study supports previous findings produced by this
laboratory and others using highly sensitive measles virus specific PCR diagnostic
technology.
http://tinyurl.com/aoec5b


Absence of Detectable Measles Virus Genome Sequence in Inflammatory Bowel
Disease Tissues and Peripheral Blood Lymphocytes
Afzal MA et al. Journal of Medical Virology. 1998; 55(3):243-9
Study looked for measles virus in 93 colonoscopic biopsies and 31 peripheral blood
lymphocyte preparations, examined and obtained from patients with inflammatory
bowel disease (IBD) and noninflammatory controls.
AUTHOR CONCLUSION: Measles virus was not detected using this method.
http://www.ncbi.nlm.nih.gov/pubmed/9624 ... rezSystem2.


PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDo
cSum
Autism and Measles, Mumps, and Rubella Vaccine: No Epidemiological Evidence
for a Causal Association
Taylor B et al. Lancet. 1999;353 (9169):2026-9
Researchers looked for a change in trend in incidence or age at diagnosis associated
with the introduction of measles, mumps and rubella (MMR) vaccination to the
United Kingdom in 1988. The study identified 498 cases of autism (261 of core
autism, 166 of atypical autism, and 71 of Asperger syndrome) in children born in the
UK since 1979. There was a steady increase in cases by year of birth with no sudden
“step-up” or change in the trend line after the introduction of MMR vaccination.
There was no difference in age at diagnosis between the cases vaccinated before or
after 18 months of age and those never vaccinated. There was no temporal association
between onset of autism within 1 or 2 years after vaccination with MMR.
Developmental regression was not clustered in the months after vaccination.
AUTHOR CONCLUSION: Data do not support a causal association between MMR
vaccine and autism. If such an association occurs, it is so rare that it could not be
identified in this large regional sample.
http://tinyurl.com/5bgvwg


No Evidence for Measles, Mumps, and Rubella Vaccine-Associated Inflammatory
Bowel Disease or Autism in a 14-year Prospective Study
Peltola H et al. Lancet. 1998; 351:1327-8
Prospective study of 3 million adverse events in temporal relation to MMR vaccine.
A form was filled and posted to the data collectors, followed by another form with
further information 2-3 weeks later. Researchers traced subjects who developed
gastrointestinal symptoms or signs lasting 24 hours or more at any time after MMR
vaccination (apart from within the first hour). Researchers also checked hospital and
health center records or interviewed the local public-health nurses.
AUTHOR CONCLUSION: Over a decade’s effort to detect all severe adverse events
associated with MMR vaccine could find no data supporting the hypothesis that it
would cause pervasive developmental disorder or inflammatory bowel disease.
http://www.freenetpages.co.uk/hp/ginger ... 201998.pdf


Exposure to Measles in Utero and Crohn’s Disease: Danish Register Study
Nielsen LL et al. British Medical Journal. 1998; 316(7126):196-7
Investigators identified 472 women aged 15 to 43 years who had been admitted with
measles between 1915 and 1966. Thirty-three were pregnant: 11 developed measles
during the first trimester, 9 during the second, 6 during the third, and 9 had
exanthema less than 14 days after delivery. Of the 26 offspring identified (including
one set of twins), four died, one in infancy. The diagnoses of the other three, who
died as adults, did not suggest inflammatory bowel disease. Among individuals still
alive (median age 51.4 (36-79) years) none were registered as having Crohn’s disease
or inflammatory bowel disease.
AUTHOR CONCLUSION: Exposure to measles in utero does not seem to be
strongly associated with the development of Crohn’s disease later in life.
http://www.bmj.com/cgi/content/short/316/7126/196


U.S. Court of Federal Claims decision in Omnibus Autism Proceeding
On Feb. 12, 2009, the “vaccine court” ruled in three test cases on the theory that
MMR vaccine and the vaccine preservative thimerosal are linked to autism. The court
found the scientific evidence is overwhelmingly contrary to this theory.
http://www.uscfc.uscourts.gov/node/5026
Studies looking at thimerosal:
Prenatal and Infant Exposure to Thimerosal From Vaccines and Immunoglobulins
and Risk of Autism
Price C et al., Pediatrics. Vol. 126 No. 4 October 2010, pp. 656-664
Researchers reviewed managed care organization records and conducted interviews
with the parents of 256 children who were verified to have ASD according to a
standardized personal evaluation. Children with ASD were further categorized as
having autistic disorder or ASD with regression. Another 752 children without
autism, matched to the ASD children by birth year, gender and managed care
organization, were also studied. For none of the autism outcomes was prenatal or
early life receipt of thimerosal-containing vaccines and immunoglobulins
significantly greater among children with ASD than among children without ASD.
AUTHOR CONCLUSION: These results add to the evidence that thimerosalcontaining
vaccines do not increase the risk of autism.
http://pediatrics.aappublications.org/c ... /126/4/656


Continuing increases in autism reported to California's developmental services
system: mercury in retrograde
Schechter and Grether, 2008, Archives of General Psychiatry. 65(1):19-24
Study analyzed autism client data from the California Department of Developmental
Services between 1995 and 2007. Even though thimerosal was absent from scheduled
childhood vaccines after 2002, cases of autism continued to climb quarter by quarter.
AUTHOR CONCLUSION: The California DDS data do not show any recent
decrease in autism in California despite the exclusion of more than trace levels of
thimerosal from nearly all childhood vaccines. The data do not support the hypothesis
that exposure to thimerosal during childhood is a primary cause of autism.
http://www.ncbi.nlm.nih.gov/pubmed/1818 ... trezSystem
2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RV
DocSum


Mercury Levels in Newborns and Infants After Receipt of Thimerosal-Containing
Vaccines
Pichichero, et al., Pediatrics. Vol. 121 No. 2, 2008, pp. e208-e214
Study assessed blood mercury levels of 216 healthy children prior to immunization
with thimerosal-containing vaccines, and 12 hours to 30 days after. The blood
mercury half-life was calculated to be 3.7 days and returned to prevaccination levels
by day 30.
AUTHOR CONCLUSION: The blood half-life of intramuscular ethyl mercury from
thimerosal in vaccines in infants is substantially shorter than that of oral methyl
mercury in adults. Increased mercury levels were detected in stools after vaccination,
suggesting that the gastrointestinal tract is involved in ethyl mercury elimination.
Because of the differing pharmacokinetics of ethyl and methyl mercury, exposure
guidelines based on oral methyl mercury in adults may not be accurate for risk
assessments in children who receive thimerosal-containing vaccines.
http://pediatrics.aappublications.org/c ... 121/2/e208


Early Thimerosal Exposure and Neuropsychological Outcomes at 7 to 10 Years
Thompson, et al. 2007, New England Journal of Medicine. 357:1281-1292
Study compared early exposure to thimerosal-containing vaccines to 42
neuropsychological outcomes in 1,047 children between the ages of 7 and 10 years.
Exposure to mercury from thimerosal was determined from computerized
immunization records, medical records, personal immunization records and parent
interviews.
AUTHOR CONCLUSION: The study does not support a causal association between
early exposure to mercury from thimerosal-containing vaccines and immune
globulins and deficits in neuropsychological functioning at the age of 7 to 10 years.
http://tinyurl.com/5ndvpe
Pervasive Developmental Disorders in Montreal, Quebec, Canada: Prevalence and
Links With Immunizations
Fombonne, et al., Pediatrics. Vol. 118 No. 1, 2006, pp. e139-e150
Quantified thimerosal and measles, mumps rubella (MMR) vaccine uptake in 28,000
Canadian children born between 1987 and 1998, of whom180 were identified with a
pervasive developmental disorder.
AUTHOR CONCLUSION: The data rule out an association between pervasive
developmental disorder and either high levels of ethyl mercury exposure comparable
with those experienced in the United States in the 1990s or 1- or 2-dose measlesmumps-
rubella vaccinations.
http://tinyurl.com/5c27nu


Immunization Safety Review: Vaccines and Autism
Institute of Medicine, The National Academies Press: 2004
The IOM's Committee on Immunization Safety Review was convened in the fall of
2000 to provide an independent review of increasingly prominent vaccine safety
concerns. The 15 committee members with expertise in pediatrics, internal medicine,
immunology, neurology, infectious diseases, epidemiology, biostatistics, public
health, risk perception, decision analysis, nursing, genetics, ethics and health
communications analyzed over 200 relevant studies.
AUTHOR CONCLUSION: The committee rejected a causal relationship between
the MMR vaccine and autism as well as a causal relationship between thimerosalcontaining
vaccines and autism.
http://books.nap.edu/catalog.php?record ... escription


Thimerosal Exposure in Infants and Developmental Disorders: A Retrospective
Cohort Study in the United Kingdom Does Not Support a Causal Association
Andrews N et al., Pediatrics. Vol. 114 No. 3, 2004, pp. 584-591
Study analyzed thimerosal exposure and possible development delays in 109,863
children born in the United Kingdom from 1988-97. Exposure was defined according
to the number of DTP/DT doses received by 3 and 4 months of age and also the
cumulative age-specific DTP/DT exposure by 6 months.
AUTHOR CONCLUSION: With the possible exception of tics, there was no
evidence that thimerosal exposure via DTP/DT vaccines causes neurodevelopmental
disorders.
http://tinyurl.com/7rvj6m
Autism and thimerosal-containing vaccines: Lack of consistent evidence for an
association
Stehr-Green P et al., American Journal of Preventive Medicine. 2003; 25(2):101-6
Study compared the prevalence/incidence of autism in California, Sweden and
Denmark from the mid-80s to the late 90s with average exposures to thimerosalcontaining
vaccines. In all three countries, the incidence and prevalence of Autism
Spectrum Disorders began to rise in the 1985-1989 period, and the rate of increase
accelerated in the early 1990s.
AUTHOR CONCLUSION: The data is not consistent with the hypothesis that
increased exposure to thimerosal-containing vaccines is responsible for the apparent
increase in the rates of autism in young children being observed worldwide.
http://www.ncbi.nlm.nih.gov/pubmed/12880876


Thimerosal and the Occurrence of Autism: Negative Ecological Evidence From
Danish Population-Based Data
Madsen et al., Pediatrics; Vol. 112 No. 3, 2003, pp. 604-606
Analyzed data from the Danish Psychiatric Central Research Register recording all
psychiatric admissions since 1971, and all outpatient contacts in psychiatric
departments in Denmark since 1995. There was no trend toward an increase in the
incidence of autism during that period when thimerosal was used in Denmark, up
through 1990. From 1991 until 2000 the incidence increased and continued to rise
after the removal of thimerosal from vaccines, including increases among children
born after the discontinuation of thimerosal.
AUTHOR CONCLUSION: The discontinuation of thimerosal-containing vaccines in
Denmark in 1992 was followed by an increase in the incidence of autism. The data do
not support a correlation between thimerosal-containing vaccines and the incidence of
autism.
http://tinyurl.com/5omq4u
A

ssociation Between Thimerosal-Containing Vaccine and Autism
Hviid et al., Journal of the American Medical Association, 2003; 290(13):1763-6
Study of 467,000 children born in Denmark between 1990 and 1996 compared
children who were vaccinated with a thimerosal-containing vaccine to children who
received a thimerosal-free formulation of the same vaccine. The risk of autism and
other autism spectrum disorders did not differ significantly between children
vaccinated with thimerosal-containing vaccine and children vaccinated with
thimerosal-free vaccine.
AUTHOR CONCLUSION: The results do not support a causal relationship between
childhood vaccination with thimerosal-containing vaccines and development of
autistic-spectrum disorders.
http://tinyurl.com/5rtzjd


Thimerosal Exposure in Infants and Developmental Disorders: A Prospective
Cohort Study in the United Kingdom Does Not Support a Causal Association
Heron et al., Pediatrics. Vol. 114 No. 3, 2004, pp. 577-583
The researchers monitored the thimerosal exposure of more than 14,000 children born
in the UK between 1991 and 1992. The age at which doses of thimerosal-containing
vaccines were administered was recorded, and measures of mercury exposure by 3, 4
and 6 months of age were calculated and compared with measures of childhood
cognitive and behavioral development covering from 6 to 91 months of age.
AUTHOR CONCLUSION: No convincing evidence was found that early exposure to
thimerosal had any deleterious effect on neurologic or psychological outcome.
http://pediatrics.aappublications.org/c ... /114/3/577


Additional studies looking at vaccine safety:
On-time Vaccine Receipt in the First Year Does Not Adversely Affect
Neuropsychological Outcomes
Smith M and Woods C, Pediatrics. Vol. 125 No. 6 June 2010, pp. 1134-1141
The study of data on more than 1,000 children born between 1993 and 1997
looked at their vaccination schedules up to 1 year of age, and studied their
performance 7 to 10 years later on 42 different neuropsychological outcomes.
Timely vaccination was associated with better performance on numerous
outcomes. The less-vaccinated children did not do significantly better on any of
the outcomes.
AUTHOR CONCLUSION: This comparison of children vaccinated on time with
children whose vaccinations were delayed or incomplete found no benefit in
delaying immunizations during the first year of life. For parents who are
concerned that children receive too many vaccines too soon, these data may
provide reassurance that timely vaccination during infancy has no adverse effect
on long-term neuropsychological outcomes.
http://pediatrics.aappublications.org/c ... 125/6/1134

Studies looking at measles, mumps and rubella (MMR) vaccine:
Lack of Association Between Measles-Mumps-Rubella Vaccination and Autism in
Children: A Case-Control Study
Budzyn D, et al. The Pediatric Infectious Disease Journal. Vol. 29, No. 5, May 2010
Researchers in Poland compared vaccination history and autism diagnosis in 96
children with autism, ages 2 to 15, as well as 192 children in a control group. For
children diagnosed before a diagnosis of autism, the autism risk was lower in children
who received MMR vaccine than in nonvaccinated children. A similar result was
achieved for the single-antigen measles vaccine.
AUTHOR CONCLUSION: The study provides evidence against the association of
autism with either MMR or a single measles vaccine.
http://www.ncbi.nlm.nih.gov/pubmed/19952979


Lack of Association between Measles Virus Vaccine and Autism with Enteropathy:
A Case-Control Study
Hornig M et al., PLoS ONE 2008, 3(9): e3140 doi:10.1371/journal.pone.0003140
Researchers looked for measles virus in the guts of 25 children with both autism and
gastrointestinal disorders, and another 13 children with the same gastrointestinal
disorders but no autism. The virus was detected in one child from each group.
AUTHOR CONCLUSION: This study provides strong evidence against association
of autism with persistent measles virus RNA in the gastrointestinal tract or with
measles, mumps and rubella (MMR) vaccine exposure.
http://www.plosone.org/article/info%3Ad ... ne.0003140


Measles Vaccination and Antibody Response in Autism Spectrum Disorders
Baird G et al., Archives of Disease in Childhood 2008; 93(10):832-7
Case-control study of 98 vaccinated children aged 10-12 years in the UK with autism
spectrum disorder (ASD) and two control groups of similar age: 52 children with
special educational needs but no ASD and 90 children in the typically developing
group. No difference was found between cases and controls for measles antibody
response. There was no dose-response relationship between autism symptoms and
antibody concentrations.
AUTHOR CONCLUSION: No association between measles vaccination and ASD
was shown.
http://tinyurl.com/dn6yy8


MMR-Vaccine and Regression in Autism Spectrum Disorders: Negative Results
Presented from Japan
Uchiyama T et al. Journal of Autism and Developmental Disorders, 2007; 37(2):210-7
Study of 904 patients with Autism Spectrum Disorders (ASD). During the period of
measles, mumps and rubella vaccine (MMR) usage, no significant difference was
found in the incidence of regression between MMR-vaccinated children and nonvaccinated
children. Among the proportion and incidence of regression across the
three MMR-program-related periods (before, during and after MMR usage), no
significant difference was found between those who had received MMR and those
who had not. Moreover, the incidence of regression did not change significantly
across the three periods.
AUTHOR CONCLUSION: The data do not support an association between MMR
and autism.
http://tinyurl.com/6c6o4r


No Evidence of Persisting Measles Virus in Peripheral Blood Mononuclear Cells
from Children with Autism Spectrum Disorder
D’Souza Y et al. Pediatrics 2006; 118(4):1664-75
Peripheral blood mononuclear cells were isolated from 54 children with Autism
Spectrum Disorders (ASD) and 34 developmentally normal children, and up to 4 realtime
polymerase chain reaction assays and 2 nested polymerase chain reaction assays
were performed. No sample from either ASD or control groups was found to contain
nucleic acids from any measles virus gene. In the nested polymerase chain reaction
and in-house assays, none of the samples yielded positive results. Furthermore, there
was no difference in anti-measles antibody titers between the autism and control
groups.
AUTHOR CONCLUSION: There is no evidence of measles virus persistence in the
peripheral blood mononuclear cells of children with ASD.
http://tinyurl.com/dcb79o


Immunizations and Autism: A Review of the Literature
Doja A, Roberts W. The Canadian Journal of Neurological Sciences 2006; 33(4):341-6
Literature review found very few studies supporting an association between vaccines
and autism, with the overwhelming majority showing no causal association between
the measles, mumps and rubella (MMR) vaccine and autism. The vaccine
preservative thimerosal has alternatively been hypothesized to have a possible causal
role in autism. No convincing evidence was found to support an association between
the vaccine preservative thimerosal and autism, nor for the use of chelation therapy in
autism.
AUTHOR CONCLUSION: With decreasing uptake of immunizations in children and
the inevitable occurrence of measles outbreaks, it is important that clinicians be aware
of the literature concerning vaccinations and autism so that they may have informed
discussions with parents and caregivers.
http://tinyurl.com/ddnqq7


Pervasive Developmental Disorders in Montreal and Quebec, Canada: Prevalence
and Links with Immunizations
Fombonne E et al. Pediatrics. 2006; 118(1):e139-50
Study of thimerosal and measles, mumps and rubella (MMR) vaccine uptake in
28,000 Canadian children born between 1987 and 1998, of whom 180 were identified
with a pervasive developmental disorder.
AUTHOR CONCLUSION: The data rule out an association between pervasive
developmental disorder and either high levels of ethyl mercury exposure comparable
with those experienced in the United States in the 1990s or 1- or 2-dose MMR
vaccinations.
http://tinyurl.com/5c27nu

Is there a ‘regressive phenotype’ ofAutismSpectrumDisorder associatedwith themeaslesmumps-
rubella vaccine?ACPEAStudy
Richler et al. Journal of Autism and Developmental Disorders. 2006
A multi-site study of 351 children with Autism Spectrum Disorders (ASD) and 31
typically developing children used caregiver interviews to describe the children’s
early acquisition and loss of social-communication milestones. For the majority of
children with ASD who had experienced a regression, pre-loss development was
clearly atypical.
AUTHOR CONCLUSION: No evidence that onset of autistic symptoms or of
regression was related to measles, mumps and rubella vaccination.
http://tinyurl.com/66gtk2


Relationship between MMR Vaccine and Autism
Klein KC, Diehl EB. The Annals of Pharmacotherapy. 2004; 38(7-8):1297-300
Ten articles that specifically evaluated the possible relationship between the measles,
mumps and rubella (MMR) vaccine and autism were identified. Review articles,
commentaries, and evaluations of a link between gastrointestinal symptoms in autistic
children and MMR immunization were excluded.
AUTHOR CONCLUSION: Based upon the current literature, it appears that there is
no relationship between MMR vaccination and the development of autism.
http://tinyurl.com/chdjrk


Immunization Safety Review: Vaccines and Autism
Institute of Medicine, The National Academies Press: 2004
The IOM's Committee on Immunization Safety Review was convened in the fall of
2000 to provide an independent review of increasingly prominent vaccine safety
concerns. The 15 committee members with expertise in pediatrics, internal medicine,
immunology, neurology, infectious diseases, epidemiology, biostatistics, public
health, risk perception, decision analysis, nursing, genetics, ethics and health
communications analyzed over 200 relevant studies.
AUTHOR CONCLUSION: The committee rejected a causal relationship between
the MMR vaccine and autism as well as a causal relationship between thimerosalcontaining
vaccines and autism.
http://books.nap.edu/catalog.php?record ... escription


No effect of MMR withdrawal on the incidence of autism: a total population study
Honda H et al, Journal of Child Psychology and Psychiatry 2005 June; 46(6):572-9
Study examined incidence of Autism Spectrum Disorders (ASD) to age 7 for children
born between 1988 and 1996 in Yokohama, Japan. The measles, mumps and rubella
(MMR) vaccination rate in Yokohama declined significantly in the birth cohorts of
years 1988-92, and no MMR vaccines were administered in 1993 or thereafter. In
contrast, cumulative incidence of ASD up to age 7 increased significantly in the birth
cohorts of years 1988 through 1996 and most notably rose dramatically beginning
with the birth cohort of 1993.
AUTHOR CONCLUSION: MMR vaccination is not likely to be a main cause of
ASD, and cannot explain the rise over time in the incidence of ASD. Withdrawal of
MMR in countries where it is still being used cannot be expected to lead to a
reduction in the incidence of ASD.
http://tinyurl.com/d8f3lg


No evidence for links between autism, MMR and measles virus
Chen W et al, Psychological Medicine 2004 April;34(3):543-53
Study compared 2,407 persons with autism born between 1959 and 1993; to 4,640
Down syndrome subjects born between 1966 and 1993.
AUTHOR CONCLUSION: No increased risk of autism was found following
exposures to wild measles and vaccinations with monovalent measles, and Urabe or
Jeryl-Lynn variants of measles, mumps and rubella (MMR) vaccine.
http://tinyurl.com/5msou2
Age at First Measles-Mumps-Rubella Vaccination in Children with Autism and
School-Matched Control Subjects: A Population-Based Study in Metropolitan
Atlanta
DeStefano F et al. Pediatrics 2004; 113(2): 259-66
Study compared ages at first measles, mumps and rubella (MMR) vaccination
between children with autism and children who did not have autism in the total
population and in selected subgroups, including children with regression in
development.
AUTHOR CONCLUSION: Similar proportions of case and control children were
vaccinated by the recommended age or shortly after (ie, before 18 months) and before
the age by which atypical development is usually recognized in children with autism
(ie, 24 months).
http://pediatrics.aappublications.org/c ... /113/2/259


MMR Vaccination and Pervasive Developmental Disorders: A Case-Control Study
Smeeth L et al. Lancet 2004; 364(9438):963-9
Matched case-control of 1,295 people born in 1973 or later who had first recorded
diagnosis of pervasive developmental disorder while registered with a contributing
general practice between 1987 and 2001. Controls (4,469) were matched on age, sex
and general practice. 1,010 cases (78.1%) had measles, mumps and rubella (MMR)
vaccination recorded before diagnosis, compared with 3,671 controls (82.1%) before
the age at which their matched case was diagnosed,
AUTHOR CONCLUSION: Data suggest that MMR vaccination is not associated
with an increased risk of pervasive developmental disorders.
http://tinyurl.com/8wlhfj


Prevalence of Autism and Parentally Reported Triggers in a North East London
Population
Lingam R et al. Archives of Disease in Childhood. 2003; 88(8):666-70
Study of reported age of onset of Autism Spectrum Disorder (ASD) among 567
children in northeast London born between 1979 and 1998. The age at diagnosis of
ASD was estimated to have decreased per five-year period since 1983, by 8.7% for
childhood autism and by 11.0% for atypical autism.
AUTHOR CONCLUSION: The data suggest that a rise in autism prevalence was
likely due to factors such as increased recognition, a greater willingness on the part of
educators and families to accept the diagnostic label, and better recording systems.
The proportion of parents attributing their child's autism to MMR appears to have
increased since August 1997.
http://adc.bmj.com/cgi/content/abstract/88/8/666


A Population-Based Study of Measles, Mumps, and Rubella Vaccination and
Autism
Madsen KM et al. New England Journal of Medicine. 2002; 347(19):1477-82
Compared relative risk of Autism Spectrum Disorder (ASD) in children vaccinated
with measles, mumps and rubella (MMR) vaccine and unvaccinated children born in
Denmark between 1991 and 1998. Of the 537,303 children in the cohort, 82% had
received the MMR vaccine. Researchers identified 316 children with a diagnosis of
autism and 422 with a diagnosis of other ASDs. There was no association between
the age at the time of vaccination, the time since vaccination, or the date of
vaccination and the development of autism.
AUTHOR CONCLUSION: This study provides strong evidence against the
hypothesis that MMR vaccination causes autism.
http://tinyurl.com/5eob5k


Neurologic Disorders after Measles-Mumps-Rubella Vaccination
Makela A et al. Pediatrics. 2002; 110:957-63
Study of 535,544 1- to 7-year-old children who were vaccinated between November
1982 and June 1986 in Finland.
AUTHOR CONCLUSION: Data do not support an association between measles,
mumps and rubella (MMR) vaccination and encephalitis, aseptic meningitis or
autism.
http://tinyurl.com/6ybfjr


Relation of Childhood Gastrointestinal Disorders to Autism: Nested Case Control
Study Using Data from the UK General Practice Research Database
Black C et al. British Medical Journal. 2002; 325:419-21
Nested case control study of 96 children diagnosed with autism and 449 controls. The
estimated odds ratio for a history of gastrointestinal disorders among children with
autism compared with children without autism was 1.0 (95% confidence interval 0.5
to 2.2).
AUTHOR CONCLUSION: No evidence was found that children with autism were
more likely than children without autism to have had defined gastrointestinal
disorders at any time before their diagnosis of autism.
http://tinyurl.com/csudoy


Measles, Mumps, and Rubella Vaccination and Bowel Problems or Developmental
Regression in Children with Autism: Population Study
Taylor B et al. British Medical Journal. 2002; 324(7334):393-6
Population study of 278 children with core autism and 195 with atypical autism, born
between 1979 and 1998. The proportion of children with developmental regression
(25% overall) or bowel symptoms (17%) did not change significantly during the 20
years from 1979, a period which included the introduction of measles, mumps and
rubella (MMR) vaccination in October 1988.
AUTHOR CONCLUSION: Data provide no support for an MMR associated “new
variant” form of autism with developmental regression and bowel problems, and
further evidence against involvement of MMR vaccine in the initiation of autism.
http://tinyurl.com/6oqsfc


No Evidence for a New Variant of Measles-Mumps-Rubella-Induced Autism
Fombonne E et al. Pediatrics. 2001;108(4):E58
Study compared 96 children with a pervasive developmental disorder (PDD) born
between 1992 and 1995 and who had received the measles, mumps and rubella
(MMR) vaccine, to PDD patients who did not receive MMR.
AUTHOR CONCLUSION: No evidence was found to support a distinct syndrome of
MMR-induced autism or of “autistic enterocolitis.” These results add to the largescale
epidemiologic studies that all failed to support an association between MMR
and autism at population level. These findings do not argue for changes in current
immunization programs and recommendations.
http://tinyurl.com/5adckj


Measles-Mumps-Rubella and Other Measles-Containing Vaccines Do Not Increase
the Risk for Inflammatory Bowel Disease: A Case-Control Study from the Vaccine
Safety Datalink Project
Davis RL et al. Archives of Pediatric and Adolescent Medicine. 2001;155(3):354-9
A case control study of 155 persons with inflammatory bowel disease with up to five
controls each. Neither past vaccination nor age at vaccination with other MCV was
associated with increased risk for Crohn’s disease, ulcerative colitis, or IBD. Risk for
Crohn’s disease, ulcerative colitis, or IBD was not elevated in the time immediately
following vaccination with either vaccine.
AUTHOR CONCLUSION: Vaccination with MMR or other MCV, or the timing of
vaccination early in life, did not increase the risk for IBD.
http://archpedi.ama-assn.org/cgi/conten ... /155/3/354


Time Trends in Autism and in MMR Immunization Coverage in California
Dales L et al. Journal of the American Medical Association. 2001; 285(9):1183-5
Scientists looked for correlation between increases in the rate of autism diagnoses and
increases in the rate of measles, mumps and rubella (MMR) vaccination in children
born between 1980 and 1994.
AUTHOR CONCLUSION: These data do not suggest an association between MMR
immunization among young children and an increase in autism occurrence.
http://jama.ama-assn.org/cgi/content/ab ... 285/9/1183


MMR and autism: further evidence against a causal association
Farrington CP, et al. Vaccine. 2001; Jun 14; 19(27):3632-5
Data from an earlier measles, mumps and rubella (MMR) vaccine study (Taylor et al,
2000) were reanalyzed to test a second hypothesis.
AUTHOR CONCLUSION: Results provide further evidence against a causal
association between MMR vaccination and autism.
http://tinyurl.com/5lb3w7
Mumps, Measles, and Rubella Vaccine and the Incidence of Autism Recorded by
General Practitioners: A Time Trend Analysis
Kaye JA et al. British Medical Journal. 2001; 322:460-63
Study compared prevalence of measles, mumps and rubella (MMR) vaccination
among children in the United Kingdom to rising prevalence of autism diagnoses for
children.
AUTHOR CONCLUSION: The data provide evidence that no correlation exists
between the prevalence of MMR vaccination and the rapid increase in the risk of
autism over time.
http://www.bmj.com/cgi/content/full/322/7284/460


Further Evidence of the Absence of Measles Virus Genome Sequence in Full
Thickness Intestinal Specimens from Patients with Crohn’s Disease
Afzal MA, et al. Journal of Medical Virology. 2000; 62(3):377-82
Study of specimens of macroscopically inflamed and normal intestine along with
mesenteric lymph nodes from patients with Crohn’s disease. None of the samples
examined gave any evidence of the persistence of measles virus in the intestine of
Crohn’s disease patients.
AUTHOR CONCLUSION: The study supports previous findings produced by this
laboratory and others using highly sensitive measles virus specific PCR diagnostic
technology.
http://tinyurl.com/aoec5b


Absence of Detectable Measles Virus Genome Sequence in Inflammatory Bowel
Disease Tissues and Peripheral Blood Lymphocytes
Afzal MA et al. Journal of Medical Virology. 1998; 55(3):243-9
Study looked for measles virus in 93 colonoscopic biopsies and 31 peripheral blood
lymphocyte preparations, examined and obtained from patients with inflammatory
bowel disease (IBD) and noninflammatory controls.
AUTHOR CONCLUSION: Measles virus was not detected using this method.
http://www.ncbi.nlm.nih.gov/pubmed/9624 ... rezSystem2.


PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDo
cSum
Autism and Measles, Mumps, and Rubella Vaccine: No Epidemiological Evidence
for a Causal Association
Taylor B et al. Lancet. 1999;353 (9169):2026-9
Researchers looked for a change in trend in incidence or age at diagnosis associated
with the introduction of measles, mumps and rubella (MMR) vaccination to the
United Kingdom in 1988. The study identified 498 cases of autism (261 of core
autism, 166 of atypical autism, and 71 of Asperger syndrome) in children born in the
UK since 1979. There was a steady increase in cases by year of birth with no sudden
“step-up” or change in the trend line after the introduction of MMR vaccination.
There was no difference in age at diagnosis between the cases vaccinated before or
after 18 months of age and those never vaccinated. There was no temporal association
between onset of autism within 1 or 2 years after vaccination with MMR.
Developmental regression was not clustered in the months after vaccination.
AUTHOR CONCLUSION: Data do not support a causal association between MMR
vaccine and autism. If such an association occurs, it is so rare that it could not be
identified in this large regional sample.
http://tinyurl.com/5bgvwg


No Evidence for Measles, Mumps, and Rubella Vaccine-Associated Inflammatory
Bowel Disease or Autism in a 14-year Prospective Study
Peltola H et al. Lancet. 1998; 351:1327-8
Prospective study of 3 million adverse events in temporal relation to MMR vaccine.
A form was filled and posted to the data collectors, followed by another form with
further information 2-3 weeks later. Researchers traced subjects who developed
gastrointestinal symptoms or signs lasting 24 hours or more at any time after MMR
vaccination (apart from within the first hour). Researchers also checked hospital and
health center records or interviewed the local public-health nurses.
AUTHOR CONCLUSION: Over a decade’s effort to detect all severe adverse events
associated with MMR vaccine could find no data supporting the hypothesis that it
would cause pervasive developmental disorder or inflammatory bowel disease.
http://www.freenetpages.co.uk/hp/ginger ... 201998.pdf


Exposure to Measles in Utero and Crohn’s Disease: Danish Register Study
Nielsen LL et al. British Medical Journal. 1998; 316(7126):196-7
Investigators identified 472 women aged 15 to 43 years who had been admitted with
measles between 1915 and 1966. Thirty-three were pregnant: 11 developed measles
during the first trimester, 9 during the second, 6 during the third, and 9 had
exanthema less than 14 days after delivery. Of the 26 offspring identified (including
one set of twins), four died, one in infancy. The diagnoses of the other three, who
died as adults, did not suggest inflammatory bowel disease. Among individuals still
alive (median age 51.4 (36-79) years) none were registered as having Crohn’s disease
or inflammatory bowel disease.
AUTHOR CONCLUSION: Exposure to measles in utero does not seem to be
strongly associated with the development of Crohn’s disease later in life.
http://www.bmj.com/cgi/content/short/316/7126/196


U.S. Court of Federal Claims decision in Omnibus Autism Proceeding
On Feb. 12, 2009, the “vaccine court” ruled in three test cases on the theory that
MMR vaccine and the vaccine preservative thimerosal are linked to autism. The court
found the scientific evidence is overwhelmingly contrary to this theory.
http://www.uscfc.uscourts.gov/node/5026
Studies looking at thimerosal:
Prenatal and Infant Exposure to Thimerosal From Vaccines and Immunoglobulins
and Risk of Autism
Price C et al., Pediatrics. Vol. 126 No. 4 October 2010, pp. 656-664
Researchers reviewed managed care organization records and conducted interviews
with the parents of 256 children who were verified to have ASD according to a
standardized personal evaluation. Children with ASD were further categorized as
having autistic disorder or ASD with regression. Another 752 children without
autism, matched to the ASD children by birth year, gender and managed care
organization, were also studied. For none of the autism outcomes was prenatal or
early life receipt of thimerosal-containing vaccines and immunoglobulins
significantly greater among children with ASD than among children without ASD.
AUTHOR CONCLUSION: These results add to the evidence that thimerosalcontaining
vaccines do not increase the risk of autism.
http://pediatrics.aappublications.org/c ... /126/4/656


Continuing increases in autism reported to California's developmental services
system: mercury in retrograde
Schechter and Grether, 2008, Archives of General Psychiatry. 65(1):19-24
Study analyzed autism client data from the California Department of Developmental
Services between 1995 and 2007. Even though thimerosal was absent from scheduled
childhood vaccines after 2002, cases of autism continued to climb quarter by quarter.
AUTHOR CONCLUSION: The California DDS data do not show any recent
decrease in autism in California despite the exclusion of more than trace levels of
thimerosal from nearly all childhood vaccines. The data do not support the hypothesis
that exposure to thimerosal during childhood is a primary cause of autism.
http://www.ncbi.nlm.nih.gov/pubmed/1818 ... trezSystem
2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RV
DocSum


Mercury Levels in Newborns and Infants After Receipt of Thimerosal-Containing
Vaccines
Pichichero, et al., Pediatrics. Vol. 121 No. 2, 2008, pp. e208-e214
Study assessed blood mercury levels of 216 healthy children prior to immunization
with thimerosal-containing vaccines, and 12 hours to 30 days after. The blood
mercury half-life was calculated to be 3.7 days and returned to prevaccination levels
by day 30.
AUTHOR CONCLUSION: The blood half-life of intramuscular ethyl mercury from
thimerosal in vaccines in infants is substantially shorter than that of oral methyl
mercury in adults. Increased mercury levels were detected in stools after vaccination,
suggesting that the gastrointestinal tract is involved in ethyl mercury elimination.
Because of the differing pharmacokinetics of ethyl and methyl mercury, exposure
guidelines based on oral methyl mercury in adults may not be accurate for risk
assessments in children who receive thimerosal-containing vaccines.
http://pediatrics.aappublications.org/c ... 121/2/e208


Early Thimerosal Exposure and Neuropsychological Outcomes at 7 to 10 Years
Thompson, et al. 2007, New England Journal of Medicine. 357:1281-1292
Study compared early exposure to thimerosal-containing vaccines to 42
neuropsychological outcomes in 1,047 children between the ages of 7 and 10 years.
Exposure to mercury from thimerosal was determined from computerized
immunization records, medical records, personal immunization records and parent
interviews.
AUTHOR CONCLUSION: The study does not support a causal association between
early exposure to mercury from thimerosal-containing vaccines and immune
globulins and deficits in neuropsychological functioning at the age of 7 to 10 years.
http://tinyurl.com/5ndvpe
Pervasive Developmental Disorders in Montreal, Quebec, Canada: Prevalence and
Links With Immunizations
Fombonne, et al., Pediatrics. Vol. 118 No. 1, 2006, pp. e139-e150
Quantified thimerosal and measles, mumps rubella (MMR) vaccine uptake in 28,000
Canadian children born between 1987 and 1998, of whom180 were identified with a
pervasive developmental disorder.
AUTHOR CONCLUSION: The data rule out an association between pervasive
developmental disorder and either high levels of ethyl mercury exposure comparable
with those experienced in the United States in the 1990s or 1- or 2-dose measlesmumps-
rubella vaccinations.
http://tinyurl.com/5c27nu


Immunization Safety Review: Vaccines and Autism
Institute of Medicine, The National Academies Press: 2004
The IOM's Committee on Immunization Safety Review was convened in the fall of
2000 to provide an independent review of increasingly prominent vaccine safety
concerns. The 15 committee members with expertise in pediatrics, internal medicine,
immunology, neurology, infectious diseases, epidemiology, biostatistics, public
health, risk perception, decision analysis, nursing, genetics, ethics and health
communications analyzed over 200 relevant studies.
AUTHOR CONCLUSION: The committee rejected a causal relationship between
the MMR vaccine and autism as well as a causal relationship between thimerosalcontaining
vaccines and autism.
http://books.nap.edu/catalog.php?record ... escription


Thimerosal Exposure in Infants and Developmental Disorders: A Retrospective
Cohort Study in the United Kingdom Does Not Support a Causal Association
Andrews N et al., Pediatrics. Vol. 114 No. 3, 2004, pp. 584-591
Study analyzed thimerosal exposure and possible development delays in 109,863
children born in the United Kingdom from 1988-97. Exposure was defined according
to the number of DTP/DT doses received by 3 and 4 months of age and also the
cumulative age-specific DTP/DT exposure by 6 months.
AUTHOR CONCLUSION: With the possible exception of tics, there was no
evidence that thimerosal exposure via DTP/DT vaccines causes neurodevelopmental
disorders.
http://tinyurl.com/7rvj6m
Autism and thimerosal-containing vaccines: Lack of consistent evidence for an
association
Stehr-Green P et al., American Journal of Preventive Medicine. 2003; 25(2):101-6
Study compared the prevalence/incidence of autism in California, Sweden and
Denmark from the mid-80s to the late 90s with average exposures to thimerosalcontaining
vaccines. In all three countries, the incidence and prevalence of Autism
Spectrum Disorders began to rise in the 1985-1989 period, and the rate of increase
accelerated in the early 1990s.
AUTHOR CONCLUSION: The data is not consistent with the hypothesis that
increased exposure to thimerosal-containing vaccines is responsible for the apparent
increase in the rates of autism in young children being observed worldwide.
http://www.ncbi.nlm.nih.gov/pubmed/12880876


Thimerosal and the Occurrence of Autism: Negative Ecological Evidence From
Danish Population-Based Data
Madsen et al., Pediatrics; Vol. 112 No. 3, 2003, pp. 604-606
Analyzed data from the Danish Psychiatric Central Research Register recording all
psychiatric admissions since 1971, and all outpatient contacts in psychiatric
departments in Denmark since 1995. There was no trend toward an increase in the
incidence of autism during that period when thimerosal was used in Denmark, up
through 1990. From 1991 until 2000 the incidence increased and continued to rise
after the removal of thimerosal from vaccines, including increases among children
born after the discontinuation of thimerosal.
AUTHOR CONCLUSION: The discontinuation of thimerosal-containing vaccines in
Denmark in 1992 was followed by an increase in the incidence of autism. The data do
not support a correlation between thimerosal-containing vaccines and the incidence of
autism.
http://tinyurl.com/5omq4u
A

ssociation Between Thimerosal-Containing Vaccine and Autism
Hviid et al., Journal of the American Medical Association, 2003; 290(13):1763-6
Study of 467,000 children born in Denmark between 1990 and 1996 compared
children who were vaccinated with a thimerosal-containing vaccine to children who
received a thimerosal-free formulation of the same vaccine. The risk of autism and
other autism spectrum disorders did not differ significantly between children
vaccinated with thimerosal-containing vaccine and children vaccinated with
thimerosal-free vaccine.
AUTHOR CONCLUSION: The results do not support a causal relationship between
childhood vaccination with thimerosal-containing vaccines and development of
autistic-spectrum disorders.
http://tinyurl.com/5rtzjd


Thimerosal Exposure in Infants and Developmental Disorders: A Prospective
Cohort Study in the United Kingdom Does Not Support a Causal Association
Heron et al., Pediatrics. Vol. 114 No. 3, 2004, pp. 577-583
The researchers monitored the thimerosal exposure of more than 14,000 children born
in the UK between 1991 and 1992. The age at which doses of thimerosal-containing
vaccines were administered was recorded, and measures of mercury exposure by 3, 4
and 6 months of age were calculated and compared with measures of childhood
cognitive and behavioral development covering from 6 to 91 months of age.
AUTHOR CONCLUSION: No convincing evidence was found that early exposure to
thimerosal had any deleterious effect on neurologic or psychological outcome.
http://pediatrics.aappublications.org/c ... /114/3/577


Additional studies looking at vaccine safety:
On-time Vaccine Receipt in the First Year Does Not Adversely Affect
Neuropsychological Outcomes
Smith M and Woods C, Pediatrics. Vol. 125 No. 6 June 2010, pp. 1134-1141
The study of data on more than 1,000 children born between 1993 and 1997
looked at their vaccination schedules up to 1 year of age, and studied their
performance 7 to 10 years later on 42 different neuropsychological outcomes.
Timely vaccination was associated with better performance on numerous
outcomes. The less-vaccinated children did not do significantly better on any of
the outcomes.
AUTHOR CONCLUSION: This comparison of children vaccinated on time with
children whose vaccinations were delayed or incomplete found no benefit in
delaying immunizations during the first year of life. For parents who are
concerned that children receive too many vaccines too soon, these data may
provide reassurance that timely vaccination during infancy has no adverse effect
on long-term neuropsychological outcomes.
http://pediatrics.aappublications.org/c ... 125/6/1134