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Originally Posted by AmuroRay
Odd, my response was deleted. Anyhow - Many African nations had less vaccination, and less infections overall. Wonder how all of that happened.
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I recall reading (can’t recall the source, sorry) that COVID was less infectious (lower R0 I suppose) in populations with high vitamin D. This includes most African nations as well as many SE Asian nations. Sun exposure and fish-heavy diets are both sources of Vitamin D and correlate with this. I don’t think causality was established, but it has been a while and perhaps more science has been done on this issue.