title: NIH begins second Phase I clinical trial of HIV vaccine.
mesh_terms: D016915:AIDS Vaccines / Q000008:administration & dosage* / Q000009:adverse effects; D000256:Adenoviridae / Q000235:genetics; D005822:Genetic Vectors; D018023:HIV Seronegativity; D006801:Humans; D009316:National Institutes of Health (U.S.); D014481:United States
chemical_list: D016915:AIDS Vaccines