title: Surveillance of influenza in pig herds in Czechoslovakia in 1974-1979. 2. Antibodies against influenza A (H3N2) and A (H1N1) viruses.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis*; D003604:Czechoslovakia; D014644:Genetic Variation; D053118:Influenza A Virus, H1N1 Subtype; D053122:Influenza A Virus, H3N2 Subtype; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology*; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral