<Ul> <Li> 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 . </Li> </Ul>
<Ul> <Li> 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 . </Li> </Ul>
when was hiv first identified in the united states
when was hiv first identified in the united states
1959
1959