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.
COVID‐19 convalescent plasma (CCP) and non‐CCP first‐time donor return rates. Donor Return Rates for non‐CCP donations from first‐time CCP donors are based on the presentation for regular volunteer donations after the discontinuation of CCP collections.
