Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Baseline Characteristics of Participants Receiving Vero Cell Culture--Derived Influenza Vaccine or Placebo
| Characteristics | VCIV (n = 3623) | Placebo (n = 3620) | Overall (n = 7243) |
| Male, No. (%) | 1823 (25.2) | 1865 (25.7) | 3688 (50.9) |
| Female, No. (%) | 1800 (24.9) | 1755 (24.2) | 3555 (49.1) |
| Age, years, mean (SD) [median] | 32.2 (9.7) [31.0] | 32.1 (9.7) [30.0] | 32.1 (9.7) [31.0] |
| Age range, years | 18–49 | 18–49 | 18–49 |
Abbreviations: SD, standard deviation; VCIV, Vero cell culture–derived influenza vaccine.
