Molecular evolutionary analyses strongly support the hypothesis that human
immunodeficiency viruses have recently arisen from a diverse pool of nonhuman primate …

Acquired immune deficiency syndrome (AIDS) can be caused by either of two retroviruses,
known as human immunodeficiency virus types 1 and 2 (HIV-l and HIV-2). Related viruses …

Two related but distinct viruses have been shown to cause AIDS in humans. These viruses,
human immunodeficiency virus type 1 and type 2 (HIV-l and HIV-2), are members of what is …

From what viruses the human immunodeficiency viruses (HIVs) originated is an extremely
controversial question. To address this question, we have analyzed nucleotide sequences of …

The human immunodeficiency viruses (HIV-1 and-2) together with the simian
immunodeficiency viruses (SIV) comprise the primate lentivirus family. Since the isolation of …

Simian immunodeficiency viruses (SIVs) have infected primate species long before human
immunodeficiency virus has infected humans. Dozens of species-specific lentiviruses are …

THEviruses that cause the acquired immunodeficiency syndrome (AIDS) in humans are
members of the lentivirus subfamily of retroviruses. Two related but distinct human …

Recently, we described a novel simian immunodeficiency virus (SIVlhoest) from a wild-
caught L'Hoest monkey (Cercopithecus lhoesti) from a North American zoo. To investigate …

In the absence of direct epidemiological evidence, molecular evolutionary studies of primate
lentiviruses provide the most definitive information about the origins of human …

Recombination contributes to the generation of genetic diversity in human
immunodeficiency viruses (HIV) but can only occur between viruses replicating within the …