3.
Analysis 1.1.2: RNA‐based vaccine. Outcome: confirmed symptomatic COVID‐19 after complete vaccination.
Ali 2021 included only participants 3 to 17 years of age. Frenck 2021 included only participants 12 to 15 years of age.
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.