Influenza. Introduction.
D004196:Disease Outbreaks / Q000191:economics / Q000517:prevention & control / Q000706:statistics & numerical data; D017048:Health Care Costs / Q000706:statistics & numerical data; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification; D009981:Influenza B virus / Q000302:isolation & purification; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000191:economics / Q000453:epidemiology / Q000517:prevention & control; D014481:United States / Q000453:epidemiology
D007252:Influenza Vaccines