title: Tracking variation in the AIDS virus family.
mesh_terms: D000386:AIDS-Related Complex / Q000382:microbiology; D000349:Africa; D001483:Base Sequence; D005814:Genes, Viral; D014644:Genetic Variation; D006678:HIV / Q000145:classification / Q000235:genetics* / Q000472:pathogenicity; D006801:Humans; D008264:Macrophages / Q000382:microbiology