I will add something on to my original of hypothesis. Well advanced maternal age could account for some of the tism we're seeing now but I don't think it can explain all of it .does anyone think that the level of pollution in the water and the air might be contributing to brain damage among children what we now consider autism.

I'm not trying to sound like Alex Jones but I do believe the effects of pollution and toxic metals has an impact on the way a child develops. I remember a study a few months back that linked autism to mercury exposure. The children that had autism were found to have more mercury in there baby teeth. I don't think kids are exposed to this metal in the vaccines rather I think they come in contact with it through the water supply and through the air they breather