The consumption of bushmeat is also the most probable cause for the emergence of HIV-1C in South America.
However, the types of apes, shown to carry the SIV virus, are different in South America.
The researchers, however, were able to hypothesize a phylogeny from the gathered data.
They were also able to use the molecular clock of a specific strain of HIV to determine the initial date of transmission, which is estimated to be around 1915-1931.
How the SIV virus would have transformed into HIV after infection of the hunter or bushmeat handler from the ape/monkey is still a matter of debate, although natural selection would favor any viruses capable of adjusting so that they could infect and reproduce in the T cells of a human host.