Molecular phylogenetics is able to pinpoint a crossover date to sometime in the 1920s by observing genetic changes in HIV that proceed at a predictable pace. Geneticists have been able to examine the question in several different ways, and they’re getting very consistent answers.

There’s another case in the 1960s, btw, in Texas, where a teenage boy probably died from complications of AIDS caused by HIV 1.

I’m outside on a small phone right now, so I’m handicapped searching for links, but most of the science is pretty readily available.

Jim

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Writer. Runner. Marine. Airman. Former LGBTQ and HIV activist. Former ActUpNY and Queer Nation. Polyglot. Middle-aged, uppity faggot. jamesfinnwrites@gmail.com

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