Doesn't it seem logical to think that this tendency to have an overly strong reaction to a virus or bacteria would be inherited by the child? And that this could be an underlying genetic vulnerability of the group of children who have problems after having vaccinations? As the parent of a child with autism, who had an extremely high fever after one of the vaccines, I wonder...it also fits with the anecdotal observations of more children with ASD seeming to come from families with histories of auto-immune problems, such as RA,MS,lupus,etc. It also seems to be something that could relate to the high numbers of ASD children with food allergies and sensitivities.