Influenza vaccine, 1998-1999.
D000328:Adult; D000368:Aged; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D007251:Influenza, Human / Q000517:prevention & control; D014611:Vaccination
D007252:Influenza Vaccines