Figure 6.
Anomalies of factors’ coefficient during the pre-epidemic and epidemic periods. (a) HH type; (b) LL type; (c) HL type; (d) LH type.
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.