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.
Longitudinal anti-N and anti-S antibody serology. Data represent mean of duplicate results from a COVID-19 positive individual (diagnosed in France, end of August 2020). 11 samples were obtained from the end of September 2020 until early February 2021.
