title: Apparent declining efficacy in randomized trials:  examples of the Thai RV144 HIV vaccine and South African CAPRISA 004 microbicide trials.
authors: Justin J
authors: JJ
authors: O'Hagan
authors: Miguel A
authors: MA
authors: Hernán
authors: Rochelle P
authors: RP
authors: Walensky
authors: Marc
authors: M
authors: Lipsitch
mesh_terms: D016915:AIDS Vaccines; D015658:HIV Infections / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D006801:Humans; D017589:Immunization Programs / Q000706:statistics & numerical data*; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D013019:South Africa / Q000453:epidemiology; D013785:Thailand / Q000453:epidemiology
chemical_list: D016915:AIDS Vaccines