A 2003 analysis of HIV types found in the United States, compared to known mutation rates, suggests that the virus may have first arrived in the United States in this year. (The disease spread from the 1966 American strain, but remained unrecognized for another 12 years. This is, however, contradicted by the estimated area of time of initial infection of Robert Rayford who was most likely infected around 1959.
when was hiv first identified in the united states
1959