title: The need for characterization of pathogenicity genes of recombinant DNA viruses used as human vaccines.
mesh_terms: D004274:DNA, Recombinant / Q000032:analysis; D005814:Genes, Viral; D005818:Genetic Engineering; D006801:Humans; D007114:Immunization / Q000009:adverse effects; D012900:Smallpox Vaccine / Q000009:adverse effects*; D014612:Vaccines / Q000009:adverse effects*; D014614:Vaccines, Synthetic / Q000009:adverse effects* / Q000235:genetics; D014616:Vaccinia virus / Q000235:genetics / Q000276:immunology*
chemical_list: D004274:DNA, Recombinant; D012900:Smallpox Vaccine; D014612:Vaccines; D014614:Vaccines, Synthetic