title: HIV vaccine failure prompts Merck to halt trial.
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology; D018849:Controlled Clinical Trials as Topic / Q000639:trends*; D004345:Drug Industry; D015658:HIV Infections / Q000276:immunology / Q000517:prevention & control* / Q000821:virology; D006801:Humans; D017211:Treatment Failure
chemical_list: D016915:AIDS Vaccines