title: AIDS research: human and monkey virus puzzles.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000382:microbiology*; D000818:Animals; D017977:Deltaretrovirus / Q000235:genetics* / Q000472:pathogenicity; D006678:HIV / Q000235:genetics* / Q000472:pathogenicity; D006801:Humans; D008253:Macaca mulatta; D013045:Species Specificity