BNT162b2 Against COVID-19-Associated Emergency Department and Urgent Care Visits Among Children 5-11 Years of Age: A Test Negative Design

Abstract

In a 1:1 matched test-negative design among 5- to 11-year-olds in the Kaiser Permanente Southern California health system (n = 3984), BNT162b2 effectiveness against the omicron-related emergency department or urgent care encounters was 60% [95%CI: 47−69] <3 months post-dose-two and 28% [8−43] after ≥3 months. A booster improved protection to 77% [53−88].