This is a picture of HIV virus structure. This picture represents the structure of HIV virus and how the HIV virus is organised. HIV is part of a family or group of viruses called lentiviruses. Lentiviruses other than HIV have been found in a wide range of nonhuman primates. These other lentiviruses are known collectively as simian (monkey) viruses (SIV) where a subscript is used to denote their species of origin. More about the HIV virus can be found at http://www.avert.org/origins.htm .

This photo is part of a larger HIV and AIDS picture gallery. For more HIV and AIDS photos visit www.avert.org/historyi.htm

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Photo credit: � NIAID