Relationship between human and animal infections with A2 /Hong Kong/68 - like strains of influenza virus.
D000818:Animals; D001717:Birds; D003429:Cross Reactions; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology*; D009975:Orthomyxoviridae / Q000276:immunology*; D012383:Romania; D013552:Swine