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.
Comparison of the 2 safety sets in the vaccine group or in the placebo group. The rate of adverse reactions in the first safety analysis population was compared to the rate of adverse reactions in the second safety analysis population in the vaccine group (A) and placebo group (B).
