TABLE 2.

VE by Country of Receipt of MCV at a Boarding School in Pennsylvania

Vaccination StatusnIllAttack Rate, %VE %95% CI
Unvaccinated3266.70
2-Dose overall62760.9698.692.0%–99.4%
    Both doses in United States50930.5999.195.5%–99.8%
    Both doses outside United States7534.0094.069.6%–98.3%
    1 dose in United States, 1 dose outside United States430010085.5%–undetermined