HIV's Origins Stretch Back Millions of Years
Earlier work suggested HIV 'cousins' were much more recent
By Matt Cantor, Newser User
Posted Jan 25, 2013 7:44 AM CST
A girl passes by the memorial monument to AIDS victims in Kiev, Ukraine.   (AP Photo/Efrem Lukatsky)

(Newser) – "Cousins" of the HIV virus are millions of years old—not tens of thousands, as previous research has suggested, according to a new study. Researchers in Seattle examined HIV-like viruses in a range of primates. Genetic changes in monkey and ape immune systems point to the development of such viruses between five million and 12 million years ago, the BBC reports.

HIV-like viruses known as lentiviruses occur frequently in primates, and in the 20th century, a similar pathogen transitioned from chimpanzees to humans. "While primate lentiviruses may have modern consequences for human health, they have ancient origins in our non-human primate relatives," says a scientist.

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Jan 28, 2013 11:50 AM CST
I remember reading somewhere that about 1 in 200 people have some genetic resistance to HIV. Maybe that is a little gift from our neanderthal ancestry.
Jan 26, 2013 4:43 PM CST
Jan 26, 2013 10:51 AM CST
I just realized that you only have to be 13 to be a member of That explains the comments section.