TABLE 1.

Protection factors and fit factors of surgical masks (SM) and cloth face coverings (CFC)

Reference	Protective Factor		Fit Factor
	SM	CFC	SM	CFC
Kournikakis et al.	1.6-5.6
Lee et al.	2.4 (mean)		1.7-2.5
Gwan et al.	2-12
van der Sande			4.1-5.3*	2.2-3.2*
			3.2-4.9§	1.9.-2.2§
Davies et al.			5 (median)	2 (median)
Oberg et al.			2.5-9.6
Dato et al.				13-67

*Adults. §Children.