the population included all 1952 enrolled participants who were randomly assigned to a vaccine or a placebo group and who actually received vaccine or placebo. The TIV (trivalent inactivated
influenza vaccine) used was Fluzone (Sanofi Pasteur), and the LAIV (trivalent live attenuated influenza vaccine) used was FluMist (MedImmune). The placebo was physiologic
saline administered as an intramuscular injection or as an intranasal spray. Exact 95% confidence intervals (CI) were calculated