As forecast in my piece ‘Worobey’s wobbly research’, first posted on this site on March 19th, 2008, the Canadian molecular biologist Michael Worobey has just published new calculations about the age of the AIDS virus, HIV-1, which place its origins even further back in time.
His work appears in the form of a lengthy letter to the journal Nature, entitled ‘Direct evidence of extensive diversity of HIV-1 in Kinshasa by 1960’, by M. Worobey, D.E. Teuwen, M. Bunce, S.M. Wolinsky et al.; [Nature; 2008 (October 2nd); 455; 661-664.]
On the basis of this one newly-discovered sample of HIV-1 dating from 1960, Worobey and his colleagues contend that the first human infection with the AIDS virus occurred in 1908, with outer confidence limits stretching from 1884 to 1924.