re: corona statistics look worse for developed western countries.. low overall immunity?

Probably. We see this with allergy and autoimmune disease. Why not Corona.

Many longitudinal studies, even using separated identical twins have proven this point. Did you know there is zero peanut allergy in 99% of Africa? 99% because some Westerners have moved there who were much too clean and underexposed as babies.

Pertains to the way the Chinese designed it.