title: The search for protective antigens.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000941:Antigens; D001428:Bacterial Vaccines; D003470:Culture Media; D046508:Culture Techniques; D006801:Humans; D007111:Immunity, Cellular; D014118:Toxins, Biological; D014611:Vaccination; D014612:Vaccines; D014765:Viral Vaccines; D014774:Virulence; D014776:Virus Cultivation
chemical_list: D000941:Antigens; D001428:Bacterial Vaccines; D003470:Culture Media; D014118:Toxins, Biological; D014612:Vaccines; D014765:Viral Vaccines