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ahlam1399 04-18-2021 11:57 PM

Covid ‘airborne’: Use N95 or KN95 masks, keep alternating every 24 hours, says In
 
  1. Covid ‘airborne’: Use N95 or KN95 masks, keep alternating every 24 hours, says Infectious Diseases expert India Today
  2. Ventilation,Facial Protection Best Safeguards Against Airborne Covid Kalinga TV
  3. Wearing 2 masks doubles protection against Covid virus Sambad English
  4. View Full coverage on Google News

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