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Efficacy of masks and face coverings in controlling outward aerosol particle emission from expiratory activities Scientific Reports Heavy smoke from hundreds of Canadian wildfires is drifting south across the border into the U.S., turning overcast skies yellow and brown and threatening the health of those breathing it. The Community Respirators and Masks Personal Protective Equipment CDC When and Why to Wear a Mask Using a respirator mask during wildfire smoke events Bandanas and dust masks won't cut it. When wildfire smoke is in the air, you need more than a fashion statementyou need filtration. N95, KN95, and KF94 respirators are your best bet

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