HIV has at least one similarly plausible but unprovable origin story - concerning the unintended consequences of polio vaccination in the 1950s. https://pubme

HIV has at least one similarly plausible but unprovable origin story - concerning the unintended consequences of polio vaccination in the 1950s. https://pubmed.ncbi.nlm.nih.gov/7935079/ https://pubmed.ncbi.nlm.nih.gov/7935079/