Table 1.

Correlation of PM2.5, CO, NO₂ and O₃ with the number of SARS-CoV-2 cases by region.

Cases by Region	Environmental Pollutants	Spearman’s ρ	p-Value
Florida	Particulate matter (PM2.5)	0.355	<0.001 *
	Carbon monoxide (CO)	0.182	<0.001 *
	Nitrogen dioxide (NO2)	0.597	<0.001 *
	Ozone (O3)	0.198	0.001 *
Los Angeles	Particulate matter (PM2.5)	0.207	<0.001 *
	Carbon monoxide (CO)	0.394	<0.001 *
	Nitrogen dioxide (NO2)	0.544	<0.001 *
	Ozone (O3)	0.202	0.001 *
New Mexico	Particulate matter (PM2.5)	0.132	0.024 *
	Carbon monoxide (CO)	0.326	<0.001 *
	Nitrogen dioxide (NO2)	0.384	<0.001 *
	Ozone (O3)	0.173	0.003 *
New York	Particulate matter (PM2.5)	0.432	<0.001 *
	Carbon monoxide (CO)	0.448	<0.001 *
	Nitrogen dioxide (NO2)	0.468	<0.001 *
	Ozone (O3)	0.347	<0.001 *
Ohio	Particulate matter (PM2.5)	0.394	<0.001 *
	Carbon monoxide (CO)	0.468	<0.001 *
	Nitrogen dioxide (NO2)	0.035	<0.001 *
	Ozone (O3)	0.820	<0.001 *

* Statistically significant at 5% level of significance.