title: Immunodeficiency viruses: the simian-human connection.
authors.forename: R F
authors.initials: RF
authors.lastname: Doolittle
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000635:transmission*; D000349:Africa; D000818:Animals; D015497:HIV-1 / Q000235:genetics*; D015498:HIV-2 / Q000235:genetics*; D006801:Humans; D008251:Macaca / Q000382:microbiology*; D010802:Phylogeny; D015302:Simian Immunodeficiency Virus / Q000235:genetics*