Table 2.

Relationship between qPCR results in copies/mL of waste, the normalized cumulative population, and the location on the cumulative infection curve.

Location	Reference	Primer	Slope of curve in Fig. 12	R2	Average new cases per day during the analysis period	Average new cases per day 8-days after the analysis period	Sampling period in relation to cumulative curve
Montana	(Nemudryi et al., 2020)	N1	−1.1292	0.49	18	9	Very Early in the curve
		N2	−1.2436	0.66
Connecticut	(Peccia et al., 2020)	N1	−0.0127	0.01	658	748	Mid of the exponential growth
		N2	0.0541	0.02
Boston	(F. Wu et al., 2020)	N1	0.0183	0.01	166	1223	Early in the curve
		N2	0.1809	0.04
		N3	−0.0127	0.01
Paris	(Wurtzer et al., 2020a)	E	0.3771	0.50	874	2348	The entire exponential growth period
Spain	(Randazzo et al., 2020a)	N1	0.0318	0.06	139	151	Early to mid of the exponential growth
		N2	0.1109	0.32
Netherlands	(Medema et al., 2020a)	N1	0.9317	0.58	265	579.2	Early in the curve
		N2	0.9279	0.55
		N3	1.3142	0.70