Figure 1.
Number of positive nasopharyngeal tests per day among healthcare workers in a research and teaching hospital in Milan, Italy, February 24 to July 8, 2020.
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.