title: Present status of live influenza A virus vaccine.
mesh_terms: D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D002675:Child, Preschool; D006224:Cricetinae; D005814:Genes, Viral; D006801:Humans; D009980:Influenza A virus / Q000276:immunology*; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology; D009154:Mutation; D014611:Vaccination; D014779:Virus Replication
chemical_list: D007252:Influenza Vaccines