title: Testing high-risk individuals every 3 months most cost-effective.
mesh_terms: D015492:AIDS Serodiagnosis / Q000191:economics / Q000706:statistics & numerical data*; D002487:Centers for Disease Control and Prevention, U.S.; D017281:Cost of Illness; D003362:Cost-Benefit Analysis; D015658:HIV Infections / Q000175:diagnosis*; D006801:Humans; D012307:Risk Factors; D014481:United States