Yes, and a lot of people take a bright, open, well child to a vaccination appointment, and immediately after, there is a very bad reaction: strange, high-pitched “pain” crying, fevers, etc. And then within days the child regresses. Stops talking, stops being an open, playful child. Focuses inward, engages in repetitive stimming behavior.
I think we need to count these reactions along with genetics when we determine causation.
It is obvious that some people are more affected by various environmental experiences, or toxins, than others. Genetics could explain who is more susceptible.
See I do not know what brought forth the literal transformation in this child. But what was an outgoing, full of life, hand eye coordination I have never seen before in a child that age, loved to eat, overnight withdrew from his surroundings. It is like his taste buds were sent on high alert and could tell the difference in brands of peanut butter by taste and texture. A few years back he was diagnosed with juvenile diabetes. And interestingly his ritual eating habits have actually served him well as there are a limited foods he will eat. This child is an inspiration to me in all that he has against him physically and medically.
I do not understand why the affliction is greater to males than females. I also think that this affliction could even be caused by a viral infection. I know from my own observations something happened what I do not know.
Seems to me to have the full data it need be done from birth when no symptoms are demonstrated to say with certainty the condition is planted in the genetic code from the get go.