Lifetime Costs: The typical total cost for a new septic system over a 20 year period is $6,300 to $13,000 for trenches and mounds, or $13,500 to $32,000 for alternative treatment systems. For multi-household systems, typical trench or mound systems range from $18,500 to $25,000.
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.
Recent studies indicate that one in every 2,500 children in the Navajo population inherit severe combined immunodeficiency. This condition is a significant cause of illness and death among Navajo children. Ongoing research reveals a similar genetic pattern among the related Apache people.