Vaccine research going back to square one.
D016915:AIDS Vaccines / Q000008:administration & dosage*; D002944:Circumcision, Male; D018849:Controlled Clinical Trials as Topic; D006678:HIV; D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans; D008297:Male; D012307:Risk Factors; D014611:Vaccination
D016915:AIDS Vaccines