[Viruses].
D006801:Humans; D007251:Influenza, Human / Q000188:drug therapy / Q000821:virology; D009975:Orthomyxoviridae / Q000502:physiology; D014777:Virus Diseases / Q000276:immunology / Q000821:virology*; D018406:Virus Physiological Phenomena; D014780:Viruses / Q000472:pathogenicity*