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HIV/AIDS in South Africa. HIV/AIDS is perceived to be more prevalent in South Africa than anywhere else worldwide. About 12% of the South African population is affected by HIV/AIDS; excluding children, that percentage rises to 18%.
There are two main types of human immunodeficiency virus -- HIV-1 and HIV-2. Both can lead to AIDS. However, they're very different from each other. HIV-1 is the most common type. When you hear the term HIV, it's probably HIV-1. HIV-2 occurs in a much smaller number of people, mostly in West Africa. In the U.S., it makes up only 0.01% of all HIV cases, and those are primarily people from West Africa. It's harder to transmit HIV-2 from person to person, and it takes longer for the infection to turn into AIDS. Both HIV-1 and HIV-2 have multiple groups within them. Those groups branch out even further into subtypes, or strains. HIV constantly makes copies of itself. Some strains multiply faster and can be passed from person to person more easily than others. Your doctor can treat your HIV better if she knows what strain you have.