The role of epidemiological surveillance in the immunoprophylaxis of influenza.
D000367:Age Factors; D000368:Aged; D000956:Antigens, Viral; D004196:Disease Outbreaks / Q000517:prevention & control; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000401:mortality / Q000517:prevention & control; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000276:immunology; D011159:Population Surveillance; D006113:United Kingdom; D014611:Vaccination
D000956:Antigens, Viral