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Medical surgical masks, which implement the standard YY0469 2011(Chinas Standard of Medical Surgical Masks), are commonly used medical masks in operating rooms and other environments where there is a risk of bodily fluids and blood splashes. They can block blood and bodily fluids from passing through the masks and contaminate the wearer.

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Particle Size Selective Assessment of Protection of

Mar 07, 2016 The tested FFP respirators and SMs in this study were observed to have the worst protection against particles between 0.263 and 0.384 m. The protection factors of FFP respirators against particles in the size range of 0.0931.61 m were not size dependent. The size ranges of viral and bacterial particles fall into this size range, and