It's no coincidence that almost all of the world's worst viruses come from the African continent. This is not because Africa or black people are more susceptible to disease. It is largely because the African region is generally underdeveloped, if not in a primitive stage. Whether it's relatively poor sanitation or other scientific equipment, there are places that don't even have the most basic medical facilities.
In addition, the conditions in which people live are objectively such that African and local tribal populations become petri dishes for the virus. We must recognize that most of the incurable diseases that spread from Africa to the world came from animals. Spreading through Africans and so on and then spreading to the world. HIV was originally mutated from a bacteria in gorillas and then spread to humans.
Due to this mutation, the virus entered the human body through blood transmission. The African continent, with the exception of Antarctica, is a relatively backward region. The relatively humid climate is a good petri dish for bacterial growth, and Africa is inhabited by relatively primitive populations that pay little attention to hygiene and other issues.
As a result, bacteria can easily spread into the human body, and once mutated, they can become almost a world disease. The relatively high diversity of animals across the African continents means that diseases and pathogens specific to each species can easily cross-mutate. In addition, African tribes still have many backward customs and practices. What is painted or carved on the body is not strictly sanitized or prevented. This is a completely primitive religious belief. What's more, mosquito bites in Africa are an excellent way to spread across species. Almost all outbreaks in Africa are spread through mosquito bites. Of course, this doesn't mean that all of the more famous viruses come from Africa.