evolution and H.I.V / A.I.D.S

[debbie spencer]

My name is Debbie and I am trying to write a paper for Anthropology about 
the H.I.V and A.I.D.S viruses.  I am trying to get information on the 
evolution of these diseases.  I am thinking that if we are descended from 
the apes then maybe these diseases are a mutation of the S.I.V's that 
affect monkeys and apes. I would like any information on theories that 
this encoded in our genes and that is how we pass on the viruses.  Any 
help would be appreciated.