COVID-19 — Worldwide/Unknown
WHO
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If you are healthy, you only need to wear a mask if you are taking care of a person with suspected SARS-CoV-2 infection.
China
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– People at moderate risk *of infection: surgical or disposable mask for medical use.
People at moderate risk of infection include those working in areas of high population density (eg, hospitals, train stations), those have been or live with somebody who is quarantined, and administrative staff, police, security, and couriers whose work is
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