title: A formidable challenge.
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology*; D000818:Animals; D000956:Antigens, Viral / Q000276:immunology; D006678:HIV / Q000276:immunology*; D015483:HIV Antibodies / Q000276:immunology*; D015658:HIV Infections; D054884:Host-Pathogen Interactions; D006801:Humans; D007111:Immunity, Cellular; D056724:Immunity, Humoral; D007167:Immunotherapy; D051192:Receptors, Pattern Recognition / Q000276:immunology
chemical_list: D016915:AIDS Vaccines; D000956:Antigens, Viral; D015483:HIV Antibodies; D051192:Receptors, Pattern Recognition