...as the question of HIV being introduced to humans from mid- or late-20th Century medical experiments, including Koprowski’s wide-flung polio vaccine trials or weird chimpanzee-human cocirculation treatments for Hepatic comas, it isn’t supported by the genetic record as observed after the 1980s, and stretches too far to explain the mundane (... that is of such an ubiquitous and ancient genetic platform that its relatives are even incorporated into our own genomes).

https://unglossed.substack.com/p/the-hep-b-vax-hiv-origin-theory-pt-f53