From the Centers for Disease Control and Prevention. Update: influenza activity--United States and worldwide, 1993.
D004196:Disease Outbreaks / Q000517:prevention & control / Q000706:statistics & numerical data; D014943:Global Health; D006801:Humans; D007115:Immunization Schedule; D009980:Influenza A virus / Q000276:immunology; D009981:Influenza B virus / Q000276:immunology; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control*; D014481:United States / Q000453:epidemiology
D007252:Influenza Vaccines