An international team of scientists say a "perfect storm" of population growth, sex and railways allowed HIV to spread.
A feat of viral archaeology was used to find the pandemic's origin, the team report in the journal Science.
They used archived samples of HIV's genetic code to trace its source, with evidence pointing to 1920s Kinshasa.
Their report says a roaring sex trade, rapid population growth and unsterilised needles used in health clinics probably spread the virus.
[quote author=ketchim link=topic=93120.msg591946#msg591946 date=1412351846] [size=10pt]A feat of viral archaeology was used to find the pandemic's origin[/size]
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It is easier to say it was manufactured in a Lab and sprayed in Africa