Table 3.

The effect of UV on coronavirus.

Virus		Waves	Intensity of UV	Notes	Reference
SARS-CoV-2	MOI 0.05	254 nm	3.7 mJ/cm2	SARS-CoV-2 replication was completely inactivated at UV-C dose of 3.7 mJ/cm2 after 6 days	Bianco et al. (2020)
	MOI 5		3.7 mJ/cm2	The UV-C dose of 3.7 mJ/cm2 was effective in a reduction of viral replication (3 log reduction after 24 h).
	MOI 1000		$\ge$16.9 mJ/cm2	Viral replication was totally inactivated at a dose $\ge$16.9 mJ/cm2.
SARS-CoV		BSC's UV lamp	134 μW/cm2	After 15min UV exposure, the titer of virus went down to 1.8 × 102 TCID50/mL (initial titer was 3.8 × 107 TCID50/mL). But, the virus was not completely inactivated (18.8 TCID50/mL), even after 60min of irradiation.	Kariwa, Fujii, and Takashima (2006)
SARS-CoV strain P9		260 nm	>90 μW/cm2	After 15 min UV exposure, the CPE of SARS-CoV was reduced from 51 to 75% to less than 25% and dropped to an undetectable level after 60 min irradiation.	Duan et al. (2003)
SARS-CoV		365 nm (UV-A)	2133 μW/cm2	For more than 15min, UV-A exposure didn't have significant effects on virus inactivation.	Darnell., 2004
		254 nm (UV-C)	4016 μW/cm2	UV-C exposure to virus showed increasing efficiency up to 6min (resulting in a 400-fold decrease in infectious virus). And there was no additional inactivation from 6 to 1 min.
MOI 0.05: Low-level concentration observed in closed environments (e.g. hospital rooms) MOI 5: Intermediate-level concentration corresponds to the average concentration found in the sputum of COVID-19 infected patients MOI 1000: High-level concentration corresponds to that observed in terminally diseased COVID-19 patients BSC's UV lamp: Biosafety Cabinet's UV lamp (typically 254 nm)