MMR @ 3years, safe for my autistic son???

IntenseWorld said:

For any vaccination that contains thimerosal:

http://www.epa.gov/hg/effects.htm

http://www.cdc.gov/vaccinesafety/concerns/thimerosal/thimerosal_faqs.html

There are two, very different, types of mercury which people should know about: methylmercury and ethylmercury.

Thimerosal contains a different form of mercury called ethylmercury. Studies comparing ethylmercury and methylmercury suggest that they are processed differently in the human body. Ethylmercury is broken down and excreted much more rapidly than methylmercury. Therefore, ethylmercury (the type of mercury found in the influenza vaccine) is much less likely than methylmercury (the type of mercury in the environment) to accumulate in the body and cause harm.

Note that it does not say not at all likely.  These are only snippets, please click the link to see all the information for the full picture.  See more scientific information which basically says the usual method of analysis may be invalid and they don't actually know.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1280369/

However, the proportion of inorganic mercury in the brain was much higher in the thimerosal group (21–86% of total mercury) compared to the methylmercury group (6–10%). Brain concentrations of inorganic mercury were approximately twice as high in the thimerosal group compared to the methylmercury group. Inorganic mercury remains in the brain much longer than organic mercury, with an estimated half-life of more than a year. It’s not currently known whether inorganic mercury presents any risk to the developing brain.

Given these findings, the researchers caution that risk assessments for thimerosal based on studies using blood mercury measurements may not be valid, depending on the design of the study.

The researchers emphasize, however, that the risks associated with low-level exposures to inorganic mercury in the developing brain are unknown, and they describe other research linking persistent inorganic mercury exposure with increased activation of microglia in the brain, an effect recently reported in children with autism. They recommend further research focused specifically on the biotransformation of thimerosal and its neurotoxic potential.

Firstly, you are quoting from USA websites.  

Secondly, UK childhood vaccines do NOT contain Thimerosal (mercury based preservative), which includes the MMR vaccine.  

So considering that the National Autistic Society is a UK charity, and UK childhood vaccines do not contain Thimerosal, the information above is currently not valid in relation to the routine vaccines given to children in the UK.  

Quoting something that has no bearing on the UK MMR vaccine (which does not contain Thimerosal) is rather pointless and is nothing short of scaremongering based on ignorance.

IntenseWorld said:

For any vaccination that contains thimerosal:

http://www.epa.gov/hg/effects.htm

http://www.cdc.gov/vaccinesafety/concerns/thimerosal/thimerosal_faqs.html

There are two, very different, types of mercury which people should know about: methylmercury and ethylmercury.

Thimerosal contains a different form of mercury called ethylmercury. Studies comparing ethylmercury and methylmercury suggest that they are processed differently in the human body. Ethylmercury is broken down and excreted much more rapidly than methylmercury. Therefore, ethylmercury (the type of mercury found in the influenza vaccine) is much less likely than methylmercury (the type of mercury in the environment) to accumulate in the body and cause harm.

Note that it does not say not at all likely.  These are only snippets, please click the link to see all the information for the full picture.  See more scientific information which basically says the usual method of analysis may be invalid and they don't actually know.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1280369/

However, the proportion of inorganic mercury in the brain was much higher in the thimerosal group (21–86% of total mercury) compared to the methylmercury group (6–10%). Brain concentrations of inorganic mercury were approximately twice as high in the thimerosal group compared to the methylmercury group. Inorganic mercury remains in the brain much longer than organic mercury, with an estimated half-life of more than a year. It’s not currently known whether inorganic mercury presents any risk to the developing brain.

Given these findings, the researchers caution that risk assessments for thimerosal based on studies using blood mercury measurements may not be valid, depending on the design of the study.

The researchers emphasize, however, that the risks associated with low-level exposures to inorganic mercury in the developing brain are unknown, and they describe other research linking persistent inorganic mercury exposure with increased activation of microglia in the brain, an effect recently reported in children with autism. They recommend further research focused specifically on the biotransformation of thimerosal and its neurotoxic potential.

Firstly, you are quoting from USA websites.  

Secondly, UK childhood vaccines do NOT contain Thimerosal (mercury based preservative), which includes the MMR vaccine.  

So considering that the National Autistic Society is a UK charity, and UK childhood vaccines do not contain Thimerosal, the information above is currently not valid in relation to the routine vaccines given to children in the UK.  

Quoting something that has no bearing on the UK MMR vaccine (which does not contain Thimerosal) is rather pointless and is nothing short of scaremongering based on ignorance.