Preparations for seasonal influenza and 2009 H1N1 influenza.
D006282:Health Personnel; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D009784:Occupational Diseases / Q000517:prevention & control
D007252:Influenza Vaccines