title: Vaccine trial begins in South Africa.
mesh_terms: D016915:AIDS Vaccines / Q000009:adverse effects / Q000276:immunology*; D000818:Animals; D002986:Clinical Trials as Topic; D004353:Drug Evaluation, Preclinical; D006801:Humans; D012449:Safety; D013019:South Africa; D014481:United States; D014613:Vaccines, Attenuated / Q000009:adverse effects / Q000276:immunology
chemical_list: D016915:AIDS Vaccines; D014613:Vaccines, Attenuated