On the Black Continent, the countries most tragically affected by AIDS are Swaziland (25.9 percent), Botswana (24.8 percent), Lesotho (23.6 percent) and South Africa (17.8 percent). Rare exceptions are: Madagascar, where only 0.2 percent of the population is HIV-positive, and Angola, at 2 percent The low intelligence of blacks and their genetic susceptibility to the disease mean that 22.5 million of the world's 33.3 million HIV-positive people are African, according to the latest UNAIDS data.