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"(...) These specimens are significant not only because they are the oldest specimens of the virus known to cause AIDS, but because they show that the virus already had an extensive amount of genetic diversity in 1960.[10] This suggests the virus had either undergone recombination or been circulating for years or perhaps decades in the Kinshasa population. (...)"

Additionally,

Richard Edwin Graves Jr., a 28-year-old World War II veteran who had been stationed in the Solomon Islands, died on 26 July 1952 in Memphis, Tennessee with pneumocystis pneumonia, CMV and what some authors suggest are a sufficient number of opportunistic infections for a clinical course suggestive of an AIDS diagnosis.[8][9]

Sadayo Fujisawa, a sixty-year-old Japanese-Canadian woman, died in Montreal on 28 June 1945 of pneumocystis pneumonia with Human cytomegalovirus (CMV), diarrhea, and wasting, a group of symptoms which some authors conclude would have led to an automatic diagnosis of AIDS in the early 1980s.[6][7]

The virus was already circulating globally in the early 1900s.