Sigh. Vaccines are given early, but the big issue is overuse of antibiotics which happens when kids are in preschool and start picking up every single bug on the planet (especially ear infections). Once the kids (boys especially) get put on the heavy duty antibiotics, it kills off the “good” gut stuff as well as the “infection” which means the children are unable to absorb essential nutrients from their food supply. With girls, this messing with their gut flora becomes obvious with yeast infection symptoms, but boys typically don’t “show” the yeast overgrowth because of physiology. Deny kids essential nutrients for a few years, and your kid experiences developmental regression, and an eventual diagnosis of “autism”. The fact the vaccines are administered around the same time period as the overuse of antibiotics is correlation and not causation.