Vaxxed From Cover-Up to Catastrophe one of the most prominent stories

In Vaxxed: : From Cover-Up to Catastrophe one of the most prominent stories is about triplets who reportedly developed autism after receiving vaccines. The parents of these triplets claim that all three children were typically developing until they received vaccines, after which they showed signs of autism.

Background on the McDowell Triplets:
The triplets, two boys and a girl, were born healthy and were reported to be developing typically for the first year of their lives.
According to the parents, all three children received routine vaccinations, including the MMR vaccine, and shortly afterward, they began to display signs of autism.
The parents claim that the children "regressed" into autism shortly after vaccination, meaning they lost previously acquired developmental skills such as speech, social interaction, and cognitive abilities.