title: Vaccine trial needs subjects.
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology*; D000293:Adolescent; D000328:Adult; D002986:Clinical Trials as Topic; D015658:HIV Infections / Q000276:immunology / Q000517:prevention & control*; D006262:Health; D006801:Humans; D008875:Middle Aged; D018579:Patient Selection; D014481:United States
chemical_list: D016915:AIDS Vaccines