My partner and sons Dad says he resents me for taking Son to get his vaccines.

(I am reflecting here upon my knowledge of a similar situation which arose within my wider family, rather than offering medical guidance).

If you were one of my relatives, I would have appreciated that you would have taken into account current NHS guidance, made considered healthcare choices, plus your decision-making would have been designed to also act in support of your Son and considered his personal communication needs when dealing with potential medical treatment.

If there were to have been a chance, e.g. without timely vaccination, that your Son could have contracted a circulating childhood / community illness and then needed to experience an Hospital stay (when that could have been avoided) - that would have seemed unkind.

In my wider family, there was one parent who got insistent about private rather than NHS vaccinations for their child.  The child started to receive private vaccinations - but not quite to the same typical schedule as would have been NHS customary - as, via privately, that parent had also insisted upon single type vaccines being used (but that was not warranted - based upon the child's medical circumstances).

In the meantime, the child became seriously ill (nothing to do with vaccines at all) and needed significant surgery - which was put in jeopardy when the treatment team became concerned as they realised that the customary total schedule of vaccinations had yet to be completed - as might have been reasonably expected or assumed (given the child's age under a NHS schedule). 

An extremely stressful period of additional arrangements ensued.

Eventually, (cutting a complex, critical, story short), the child did undergo their surgery and successfully recovered well.

However, along the way, the stress toll on the child's other parent (who would have ideally opted for the child to be NHS vaccinated as usual in our wider family - that parent didn't want the private approach) ...was clearly considerable. 

It was a very difficult situation for everyone in the wider family to navigate and to feel they adequately supported the child's stressed parent (a source of sadness to their relatives - as it seemed to us all: that both the child and their stressed parent had needlessly suffered the outcome of the (incomplete) private vaccination approach insisted upon by the child's other parent).

The child healthcare decisions to be taken in any household may give rise to tensions and difference of opinion - however, hopefully, the particular support needs of the child in question would ideally be considered paramount.

(I am reflecting here upon my knowledge of a similar situation which arose within my wider family, rather than offering medical guidance).

If you were one of my relatives, I would have appreciated that you would have taken into account current NHS guidance, made considered healthcare choices, plus your decision-making would have been designed to also act in support of your Son and considered his personal communication needs when dealing with potential medical treatment.

If there were to have been a chance, e.g. without timely vaccination, that your Son could have contracted a circulating childhood / community illness and then needed to experience an Hospital stay (when that could have been avoided) - that would have seemed unkind.

In my wider family, there was one parent who got insistent about private rather than NHS vaccinations for their child.  The child started to receive private vaccinations - but not quite to the same typical schedule as would have been NHS customary - as, via privately, that parent had also insisted upon single type vaccines being used (but that was not warranted - based upon the child's medical circumstances).

In the meantime, the child became seriously ill (nothing to do with vaccines at all) and needed significant surgery - which was put in jeopardy when the treatment team became concerned as they realised that the customary total schedule of vaccinations had yet to be completed - as might have been reasonably expected or assumed (given the child's age under a NHS schedule). 

An extremely stressful period of additional arrangements ensued.

Eventually, (cutting a complex, critical, story short), the child did undergo their surgery and successfully recovered well.

However, along the way, the stress toll on the child's other parent (who would have ideally opted for the child to be NHS vaccinated as usual in our wider family - that parent didn't want the private approach) ...was clearly considerable. 

It was a very difficult situation for everyone in the wider family to navigate and to feel they adequately supported the child's stressed parent (a source of sadness to their relatives - as it seemed to us all: that both the child and their stressed parent had needlessly suffered the outcome of the (incomplete) private vaccination approach insisted upon by the child's other parent).

The child healthcare decisions to be taken in any household may give rise to tensions and difference of opinion - however, hopefully, the particular support needs of the child in question would ideally be considered paramount.