Wear a mask appropriately
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Science
Carry a disposable medical mask with you when you go out.
When in crowded indoor public places with poor air circulation (e.g. elevators and other confined spaces) and when in close contact with others, it is standard to wear a mask.
Be sure to wear a mask if you have symptoms such as fever or cough, or if you live with people in home isolation or recovering from a new crown pneumonia discharge
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