Table 4.

Dry heat incubation of high (1 × 10⁵ pfu) or low (3 × 10³ pfu) doses of SARS-CoV-2 on intact 3 M™ 1860 N95 respirators.

Amount of virus	Temperature	Duration of incubation	Sample placement	# samples positive for CPE/total # samples
1 × 105 pfu	70°C	60 min	Hanging	6/6
1 × 105 pfu	75°C	60 min	Hanging	6/6
3 × 103 pfu	70°C	60 min	Hanging	6/6
3 × 103 pfu	75°C	60 min	Hanging	4/6
Controls
1 × 105 pfu	RT	60 min	Hanging	3/3
3 × 103 pfu	RT	60 min	Hanging	3/3
No virus	RT	60 min	Hanging	0/6
No virus	70°C	60 min	Hanging	0/6
No virus	75°C	60 min	Hanging	0/6