Table 1.

The correlation vectors between population density (PD), PM_2.5, PM₁₀, NH₃, O₃, dew-point temperature (TD), temperature (T), relative humidity (RH), wind (W), pressure (P) and number of SARS-CoV-2 cases in Italian provinces (Cas).

	PD	Cas
PD	1.000	0.034
PM10	0.377	0.586
PM2.5	0.354	0.597
NH3max	0.084	0.693
O3max	−0.244	−0.444
TD	0.045	−0.327
T	0.094	−0.284
RH	−0.108	−0.253
WIND	0.006	−0.327
P	0.188	−0.025