Investigating Viral Inoculation and Recovery from Medical Masks

Table 1

Viral recovery from standard (“control”) type IIR mask vs. photosensitizer-treated antiviral (AV) type IIR mask at stated times, according to international standard ISO 18184.

Mask	Replicate	TCID50/mask	Average TCID50/mask	% reduction of antiviral mask	SD	Significance
Control,; T = 0	1	6.32 × 10^5	7.38 × 10^5	99.91	±1.49 × 10^5	p < 0.01
	2	8.43 × 10^5
Control,; T = 1 h	1	2.67 × 10^5	2.34 × 10^5	99.73	±4.74 × 10^4	p < 0.05
	2	2.00 × 10^5
Antiviral,; T = 1 h	1	≤6.32 × 10^2	≤6.32 × 10^2
	2	≤6.32 × 10^2