title: Studies show increased incidence of drug-resistant virus.
mesh_terms: D004352:Drug Resistance, Microbial; D015658:HIV Infections / Q000188:drug therapy* / Q000453:epidemiology / Q000821:virology*; D015497:HIV-1; D006801:Humans; D008889:Military Personnel; D009154:Mutation; D014481:United States / Q000453:epidemiology