RT @CAPublicHealth: Effective masks have a good fit and good…

RT @CAPublicHealth: Effective masks have a good fit and good filtration. A good fit means no gaps between the face and mask while good filtration means using the right materials or multiple layers. Learn more at: https://t.co/qhO3aqNwV6 https://t.co/oMAVS9FwRx via @maringovMore

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