Wouldn't we be seeing "hot spots" in darker northern climates and trouble-free zones in sunnier southern locations?
The most compelling linkages I have seen are to certain pesticide / herbicide exposures and pollution exposures.
The most compelling linkages I have seen are to certain pesticide / herbicide exposures and pollution exposures.
like Europe, Russia, etc. ? In this countries people are bigger (thermodynamics) with bones to carry that weight so the issue with vitamin D seems to be solved somehow there - one obvious solution Nature came up with is color of skin, ie. receptivity to Sun.
Now, if you take people from sunnier location and put them into darker northern one you'll get a "hot spot":
https://www.vitamindcouncil.org/new-research-somali-immigran...
https://www.minnpost.com/politics-policy/2008/07/mysterious-...
Btw, notice that in Minnesota they blame it on the bunch of immunizations:
"Harrington suggested that differences in the genetic make-up of Africans put them more at risk for developing autism than other immigrant groups, and noted that refugee women and children must undergo numerous immunizations.
(According to school data, the percentage of Hmong children and Latino children in Minneapolis public schools with autism is not as high as Somali children with autism.)"
while in Sweden :
"A Swedish newspaper published an article last week about that country's Somali population and its high prevalence of autism. The story described a autism study that focused on Somalis. Doctors hypothesized that the high rates of autism in Somali children born in Sweden is due to the lower levels of sunlight and vitamin D immigrants get in Sweden compared with Somalia, a country near the equator. Dark skin that's covered up and a diet that doesn't include fatty fish limits absorption of vitamin D as well, according to the doctors. "
They call it the "Minnesota Disease".
I also once read that Cable television penetration rates were correlated with autism as well...