Because in Africa they generally take hydrochloroquine for malaria prevention.
Because they have malaria problems, and malaria makes how your body handles various diseases different. In fact, Epstein-Barr Virus when you also have malaria is way worse than the same virus if you don’t.
“Because in Africa they generally take hydrochloroquine for malaria prevention.”
Your absolutely true statement should be put on bill boards here in the US. Most Africans who are still in the boondocks have been exposed to most indigenous diseases since childhood. They have immunity and those that didn’t are dead.