Severe febrile illness outcomes in healthy, working adults receiving influenza vaccine v placebo
| Rate/1000 persons | |||
|---|---|---|---|
| Outcomes during 7 wk peak outbreaks | Vaccine | Placebo | Rate reduction (95% CI) |
| Number of illness episodes | 111 | 137 | 18.8% (7.4 to 28.8) |
| Days of illness | 1021 | 1404 | 27.3% (16.7 to 36.5) |
| Days of missed work | 155 | 188 | 17.9% (4.3 to 29.5) |
| Days with ≥1 health care visit | 37.6 | 50.1 | 24.8% (11.6 to 36.1) |