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.
Sera from COVID-19 patients after different days post symptom onset were tested by neutralization PCR assay. All sera samples (N=28) were from unique individuals. The boxplots show medians (middle line) and third and first quartiles (boxes), while the whiskers show minimum and maximum above and below the box.
