Figure 5.
Harmonic components (a,c) 1 and (b,d) 2 of the FPCA for data on the number of COVID-19 (a,b) infected cases, and (c,d) deaths.
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.