what disease do amish children have
What genetic diseases are common among Amish and Mennonites? Amish and Mennonites exhibit certain rare diseases uncommon in other populations. These include Ellis-van Creveld syndrome (a type of dwarfism), glutaric aciduria, Crigler-Najjar syndrome, and maple syrup urine disease.
Or perhaps because they only looked at children with autism in the Amish community. I wonder if they looked into how many Amish get things like chickenpox, smallpox, mumps, diphtheria, measles, rubella, whooping cough, shingles, the flu, HPV, rotavirus, etc etc.