UNAids and the WHO no longer talk of a single African epidemic but of highly varied outbreaks across the continent. Starting in the late 1970s and early 1980s, HIV spread in a band from West Africa across to the Indian Ocean, before moving to the southern countries where its grip is now strongest.
South Africa has the most cases in the world, with five million. Botswana, Lesotho and Swaziland have the highest percentage of people who are HIV positive.







