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  Indian J Med Microbiol
 

Figure 3: Measurements of mask surface and mannequin faces with SPY® device in terms of staining. Surface measurements of green surgical mask (a), white surgical mask (b), fabric woven mask (c), and N95 mask (d). Face measurements of green surgical mask (e), white surgical mask (f), fabric woven mask (g), and N95 mask (h) after removal

Figure 3: Measurements of mask surface and mannequin faces with SPY<sup>®</sup> device in terms of staining. Surface measurements of green surgical mask (a), white surgical mask (b), fabric woven mask (c), and N95 mask (d). Face measurements of green surgical mask (e), white surgical mask (f), fabric woven mask (g), and N95 mask (h) after removal