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 infection stages — baseline period, non-infectious period, infectious period, and recovery period. In general, the baseline period contains normal data and the infectious period contains anomalous data. The other two may or may not have any anomaly.
