Fig. 5.
a Coherence between total confirmed cases and NO2. b Coherence between deaths and NO2. c Coherence between active cases and NO2. d Coherence of recoveries and NO2
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.