The computed model correctly placed the genome of the 1959 case on an evolutionary tree.
The model estimates based on the latest data set the most reliable time of origin of the disease in humans as somewhere around 193115.
Antibodies to SIV were found in the victims' blood samples.
They also analyzed blood samples of nearly 400 monkeys and baboons to assess the degree to which their antibodies bind to HIV.
A meeting to settle this issue was sponsored by the British Royal Society and is reported in a Medscape article written by Jonathan Weber available at (about which much less is known).