This seems really racist dude. Very colonialist to assume this. A lot of people in non-industrialised and industrialist countries believe in a sky daddy and that heaven and hell are real. They may as well believe in witchcraft.

That is not how the immune system works. There is lots of info about it and it is very complicated, but stuff that has been around for literally ages, that coincided with humans evolutionary path, have been basically added to a permanent watch list and so our immune system goes haywire at the slightest hint of one of those invaders presence. Covid is still considered a novel virus, regardless of it being a few years since it’s existence, and our immune systems haven’t had time to find a good defense against it. This is a simplification, but think of covid or other viruses like a key, but a rapidly changing (mutating) key and the immune system as a really elaborate lock, that also changes (but incredibly slowly, comparatively) and yeah that’s all I’ve got. Source: I’m in undergrad studying to be a microbiologist.

Was following you until you brought up IQ. IQ tests were invented by racists to do racism. I.e., the tests were geared towards white people purposely to skew results when POC took them. Look up the history. It is equal parts horrible and fascinating.