This is the one that keeps americans buzzing the hardest. though the origins of AIDS are questionable, it's not an 'african problem'. there's cholera in mexicon, but cholera isn't a "north american problem" and that's a continent of 3 countries. Africa is 54.
there are countries that suffer from the AIDS epidemic. South Africa, Botswana, Zimbabwe, Lesotho. these are places where it's a real actual health problem. Everywhere else, calling AIDS an epidemic or something relevent to national issues is like calling the clap a pandemic or something relevent to national issues in the United states.
the AIDS story was also dropped and forgotten when it was at it's worst. Now that african countries have seen rates drop in half the new story is terrorism.
People have to realize that there's a great deal of mental laziness behind this 'problem'. People don't want their conception of the world to be complicated or challenged because it fucks with what you know. People have already decided Africa and Blacks = Hell and Demons and everything else is good to go/human. Telling them otherwise is like telling someone they're adopted on a less personal level. it just scrabbles your conception of what you have already made your mind up on an built your reality around. It's easy to, do to this conception, believe that there are countries where everyone has aids, or even 'the people' have aids, a terminal illness (meaning it's something you'll run into all the time) and these countries haven't been wiped off the face of the earth.
Nigeria has the second highest number of ppl with AIDs in africa, but due to it's population the %age is one of the lowest. that being said, you're not going to run into people 'with aids' as a commonality. I'm at the same level of risk getting an STD here, because we have an entire pantheon of shit you can catch and high rates of all of them, then i would there, which has one major monolith of a STD to worry about.
The story with AIDS is some countries in africa have it in high percentages, and they're isolated to southern africa. 80% of countries in africa have lower AIDS rates than the United States, and they have all dropped their rates by roughly half in the last 10 years.