title: Transmission lines.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission*; D000349:Africa / Q000453:epidemiology; D000890:Anti-Infective Agents / Q000008:administration & dosage; D002986:Clinical Trials as Topic; D017280:Condoms / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008297:Male; D011057:Politics; D021841:Safe Sex / Q000523:psychology / Q000706:statistics & numerical data*
chemical_list: D000890:Anti-Infective Agents