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.
Shown is the cumulative risk of reinfection with SARS-CoV-2 among previously unvaccinated patients who had recovered from Covid-19 and who were between 16 and 64 years of age (Panel A) or were 65 years of age or older (Panel B). Shading indicates the 95% confidence interval, and hatch marks indicate data censoring.
