title: Immunity's yin and yang. A successful vaccine must first avoid being eliminated by pre-existing immunity before it can promote a protective immune response.
authors.forename: Philip
authors.initials: P
authors.lastname: Cohen
mesh_terms: D016915:AIDS Vaccines / Q000276:immunology*; D000256:Adenoviridae / Q000235:genetics; D004306:Dose-Response Relationship, Immunologic; D005814:Genes, Viral; D005822:Genetic Vectors; D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans
chemical_list: D016915:AIDS Vaccines