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Does That Face Mask Really Protect You?

Face mask protective efficiency was calculated as the ratio of mannequin sample probe concentration to reference sample probe concentration. The protective efficiencies were 33.3%, 11.3%, and 6.1% for the surgi-cal, bandana, and dust masks, respectively. The N95 mask protective efficiency was 89.6%. In conclusion, the

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Respiratory Protection. 1910.134 Occupational Safety . Filtering facepiece (dust mask) An air purifying respirator equipped with a filter certified by NIOSH under 30 CFR part 11 as a high efficiency particulate air (HEPA) filter, or an air purifying respirator equipped with a filter certified for particulates by NIOSH under 42 CFR part 84; or (B)A check of elastomeric parts for pliability

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Sep 04, 2020 · As a reminder, for accurate information about COVID-19, you need to check CDC website!. The Centers for Disease Control and Prevention (CDC) recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies) especially in areas of significant community-based transmission.

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