How the HIV virus travelled from Haiti to the US 

The chart above shows;
Black (Africa) - HIV-1 ancestor in Africa.
Green (Haiti) - Virus migrates from Africa to Haiti ~1966.
Yellow (US) - Virus migrates from Haiti to the US ~1969 then rapidly disperses in worldwide.



HIV went directly from Africa to Haiti, then spread to the United States and much of the rest of the world beginning around 1969, suggests an international team of researchers. The findings settle a key debate on the history and transmission route of the deadly virus, the scientists say.
Even before HIV was identified as the cause of AIDS, Haiti's role in the disease epidemic had been hotly debated.
When AIDS was officially recognized in 1981 in the U.S., for instance, the unusually high prevalence of the disease in Haitian immigrants fueled speculation that the Caribbean island was the source of the mysterious illness.