The protective effect of intranasal immunization with inactivated influenza virus vaccine.
D000281:Administration, Intranasal; D000917:Antibody Formation; D002986:Clinical Trials as Topic; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007114:Immunization; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control; D010919:Placebos; D014774:Virulence
D007252:Influenza Vaccines; D010919:Placebos