Wow, all of those are related to the same natural immunity? I had not heard that. There must be a Nobel Prize awaiting the researcher who explains that.....
I’m glad to say that I have absolutely no idea whether I’m naturally resistant to HIV/AIDS since I have never engaged in activity that would put me at risk..... except that during chemotherapy and surgeries for cancer I have had around 12 units of blood transfusions into me at different times, so I suppose there is a remote possibility that my immune system was tested that way....... so far no problem.
My own theory is the bugs are particularly fond of antibody type "E" ~ so if you don't have "E", and many people don't (about 2% maybe), they become immune, or they simply starve the bugs to death.
That's just my theory ~
The epidemiologists are probably jumping on top of this one since the implication is there is now a very resilient flea that can make it from Afghanistan to North Africa, and then spread the infection to local fleas.
This could attack most of the world if that's the case!