To answer the question posed in the review.
The review on this website criticises this film and raises a question, they say: "Now unless I'm missing something, the polio vaccine hypothesis has a serious flaw. The film states that primate organs were the basis of the vaccine that was distributed in the US and given to millions through vaccination. Why, then, would HIV have been transmitted only to the Congolese and not to Americans?"
If you think this represents a serious flaw in the film then you weren't paying much attention, the film expressly states that it was only in the Belgian Congo that they used tissue culture from chimpanzee cells to grow the vaccine in.
The documentary said that only 100ccs of the vaccine was produced in Western labs and this small amount was sent to the various sites around the world to be grown in local tissue cultures.
The small quantity of the vaccine that was sent to the Belgian Congo was reproduced in large enough numbers to use on one million people. The film suggests that the vaccine was grown in Leopoldville in a tissue culture that was produced from the chimpanzees at the Lindi camp.
The hypothesis is that the chimpanzees at Lindi were infected with SIV and that is how the virus jumped species. This didn't happen in the states because obviously the vaccine here wasn't grown in infected tissue culture.
Also it wasn't a "program" to "vaccinate" the Congolese people, it was only an experiment to see if the vaccine worked. The fact that western scientists could "experiment" on a population of one million Congolese is no small scandal in itself.