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.
Circles represent the neutralizing antibody level in each blood sample, the center line within boxes represents median, the outer bounds of boxes represent lower and upper quartiles, and whiskers represent range. sVNT indicates surrogate virus neutralization test.
