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1 sty 2018 · This entry focuses on the current knowledge about how HIV-2, the second and more benign form of the human immunodeficiency virus, is transmitted (“HIV-2 Transmission”). First, the origin and geographical distribution of HIV-2 transmission over time will be discussed.
1 cze 2021 · Explain how HIV evolved from cross-species transmission of strains of simian immunodeficiency virus (SIV) to humans (viral zoonosis), spread out of Africa in the early 20th century, and eventually resulted in the global AIDS pandemic
5 maj 2003 · HIV-1 group M has subsequently spread globally, generating the pandemic observed today. Here, we investigate the epidemic history of HIV-2 to test previously suggested hypotheses of its origin. We provide the first estimated dates of cross-species transmissions of HIV-2.
1 lut 2017 · From Africa, HIV rapidly spread in the late 1960s to the Caribbean and then the United States, Europe, and other areas of the world, leading to the global AIDS pandemic. Both HIV-1 and HIV-2 descended genetically from Simian immunodeficiency virus via cross-species transmission.
1 sty 2004 · HIV-1 has its origin in chimpanzees and is the result of three separate transfers to humans; by contrast, HIV-2 is most closely related to strains in the sooty mangabey and is the result of at...
While a number of controversial theories attempt to explain the origin of HIV/AIDS, phylogenetic evidence suggests a zoonotic transmission of HIV to humans and implicates the chimpanzee (Pan troglodytes troglodytes) as the source of HIV-1 infection and the sooty mangabey as the source of HIV-2 infection in human populations.
1 sty 2011 · Simian immunodeficiency viruses (SIVs) from chimpanzees and gorillas from west-central Africa have crossed the species barrier on at least four occasions leading to HIV-1 in humans. HIV-2 viruses result from at least eight independent transmissions of SIVs infecting sooty mangabeys from West Africa.
