On the origin and evolution of the human immunodeficiency virus (HIV)

Abstract excerpt

The human AIDS viruses--HIV-1 and HIV-2--impose major burdens on the health and economic status of many developing countries. Surveys of other animal species have revealed that related viruses--the SIVs are widespread in a large number of African simian primates where they do not appear to cause disease. Phylogenetic analyses indicate that these SIVs are the reservoirs for the human viruses, with SIVsm from the...

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