The HIV pandemic is a continuing global health emergency. At the end of 2005, WHO and UNAIDS estimated that ~40 million people are infected with HIV, with .60% of infections affecting people living in sub-Saharan Africa. The pandemic is very much dominated by infections with HIV type 1 (HIV-1), which was discovered in 1983. In 1987, a second type of virus was identified: HIV type 2 (HIV-2). It ...