O.k. first what do we know about epidemics or pandemics? We know
that air born virus' spread very quickly. The H1N1 took 7 months
to go world wide. We know that in the case of HIV it took
between 60 and 70 years for it to become a pandemic. (Basically
1915 to 1975/85.) HIV is spread both through sexual contact, and
passed via blood from mother to child or in the case of
transfusions. It's estimated that it took around 10 to 20 people
being infected with SIV originaly in order for the virus to
mutate and effectively infect humans hence it became HIV. The
human HIV infection is traced to bush hunters along the African
coast who hunted and killed monkey's for meat to sell. By
butchering the monkeys into meat they came in contact with large
quantities of blood. These individuals were usually single men
who often made stops in ports or cities to sell the meat. They
passed the HIV on to whomever they had intercourse with. And
those individuals passed it on and so on and so on. Most of
these individuals were sexuall