Influenza as a problem in immunology.
D006801:Humans; D007109:Immunity; D007111:Immunity, Cellular; D007114:Immunization; D007156:Immunologic Memory; D007251:Influenza, Human / Q000276:immunology*; D009975:Orthomyxoviridae / Q000276:immunology; D011128:Polyradiculopathy / Q000276:immunology