title: Surveillance of influenza in pig herds in Czechoslovakia in 1974--1979. 1. Introduction of influenza epidemic A (H3N2) viruses into pig herds.
mesh_terms: D000818:Animals; D003604:Czechoslovakia; D004196:Disease Outbreaks / Q000662:veterinary; D000939:Epitopes; D005260:Female; D006801:Humans; D053122:Influenza A Virus, H3N2 Subtype; D009980:Influenza A virus / Q000276:immunology*; D007251:Influenza, Human / Q000382:microbiology; D009976:Orthomyxoviridae Infections / Q000382:microbiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology*
chemical_list: D000939:Epitopes