The origin of HIV AIDS virus – December 1st

In 1999, researchers identified a strain of chimpanzee SIV called SIVcpz, which was nearly identical to HIV. Chimps, the scientist later discovered, hunt and eat two smaller species of monkeys—red-capped mangabeys and greater spot-nosed monkeys—that carry and infect the chimps with two strains of SIV. These two strains likely combined to form SIVcpz, which can spread between chimpanzees and humans.

SIVcpz likely jumped to humans when hunters in Africa ate infected chimps, or the chimps’ infected blood got into the cuts or wounds of hunters. Researchers believe the first transmission of SIV to HIV in humans that then led to the global pandemic occurred in 1920 in Kinshasa, the capital and largest city in the Democratic Republic of Congo.

The virus spread may have spread from Kinshasa along infrastructure routes (roads, railways, and rivers) via migrants and the sex trade.

In the 1960s, HIV spread from Africa to Haiti and the Caribbean when Haitian professionals in the colonial Democratic Republic of Congo returned home. The virus then moved from the Caribbean to New York City around 1970 and then to San Francisco later in the decade.

International travel from the United States helped the virus spread across the rest of the globe.

 

Since the CDC first reported the HIV/AIDS epidemic in 1981, rumors have persisted that the deadly virus was created by the CIA to wipe out homosexuals and African Americans. Even today, the conspiracy theory has a number of high-profile believers. South African President Thabo Mbeki once touted the theory, disputing scientific claims that the virus originated in Africa and accusing the U.S. government of manufacturing the disease in military labs. When she won the Nobel Peace Prize, Kenyan ecologist Wangari Maathai used the international spotlight to support that theory as well. Others insist that the government deliberately injected gay men with the virus during 1978 hepatitis-B experiments in New York, San Francisco and Los Angeles. Still others point to Richard Nixon, who combined the U.S. Army’s biowarfare department with the National Cancer Institute in 1971. Though the co-discoverers of HIV — Dr. Robert Gallo of the National Cancer Institute and Dr. Luc Montagnier of the Pasteur Institute in Paris — don’t agree on its origins, most members of the scientific community believe the virus jumped from monkeys to humans some time during the 1930s.

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