This is something that I've been researching for decades on and off. Let's just say that I would bet my life that the HIV-AIDS pandemic came about as a result mainly of the oral polio vaccine (OPV) program in the Belgian Congo (now DRC) between 1957-1959. The evidence is quite overwhelming after all these years! I also have to say that it's unfortunate that the; HIV doesn't exist/House of Numbers/Peter Duesberg et. al. stuff have overshadowed the likely reality of the situation...
Primer article; http://www.aidsorigins.com/the-origins-of-the-aids-pandemic/
Intermediate; watch the documentary; The origin of HIV/AIDS documentary; Youtube
Advanced, read "the River" by Ed Hooper, the best pop-science book ever written IMO;
Original paperback on Amazon etc. Revised edition available online, but very long read;
Primer article; http://www.aidsorigins.com/the-origins-of-the-aids-pandemic/
Intermediate; watch the documentary; The origin of HIV/AIDS documentary; Youtube
Advanced, read "the River" by Ed Hooper, the best pop-science book ever written IMO;
Original paperback on Amazon etc. Revised edition available online, but very long read;