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Jun 01, 2018 · Objectives Many residents in Beijing use disposable face masks in an attempt to protect their health from high particulate matter (PM) concentrations. Retail masks may be certified to local or international standards, but their real-life performance may not confer the exposure reduction potential that is marketed. This study aimed to evaluate the effectiveness of a range of face masks that are ...

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Mar 20, 2020 · An oversized clear plastic bag covering the face with a respirator N95 mask underneath, secured by gown by tucking the plastic underneath gown at the front leaving a gap behind to allow ventilation, might recreate current protection.

Author: Howard Bauchner, Phil B. Fontanarosa, Edward H. Livingston

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Using a nationwide network of monitoring sites, EPA has developed ambient air quality trends for particle pollution, also called Particulate Matter (PM). PM 2.5 describes fine inhalable particles, with diameters that are generally 2.5 micrometers and smaller. Under the Clean Air Act, EPA sets and reviews national air quality standards for PM.

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