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Volume 13, Number 4—April 2007

Dispatch

Influenza Vaccine Effectiveness among US Military Basic Trainees, 2005–06 Season

Jennifer K. Strickler*Comments to Author , Anthony W. Hawksworth*, Christopher Myers*, Marina Irvine*, Margaret A.K. Ryan*, and Kevin L. Russell*
Author affiliations: *Naval Health Research Center, San Diego, California, USA;

Main Article

Table

Vaccine effectiveness against laboratory-confirmed influenza among US military basic trainees, 2005–06*†

Site Vaccinated person-weeks Unvaccinated person-weeks Cases in vaccinated trainees Cases in unvaccinated trainees Vaccine effectiveness (%) 95% CI
Fort Jackson, SC 77,874 25,958 7 13 82.1
Fort Wood, MO 67,513 22,504 2 11 93.9
Fort Benning, GA 68,652 22,884 3 0
Lackland AFB, TX 37,435 18,690 1 10 95.0
NSTC Great Lakes, IL 67,763 22,588 0 13 100.0
MCRD San Diego, CA 35,490 11,830 0 10 100.0
Total 354,727 124,454 13 57 92.0 (85.4%, 95.6%)

*CI, confidence interval; SC, South Carolina; MO, Missouri; GA, Georgia; AFB, Air Force base; TX, Texas; NSTC, Naval Service Training Command; IL, Illinois; MCRD, Marine Corps Recruit Depot; CA, California.
†Assuming 14 d before vaccine is protective.

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