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World Health Organization (WHO) - DYK: Recirculating indoor air can increase the spread of the virus that causes COVID-19. Good ventilation protects you from infection. Bring fresh, outdoor air inside and let
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Non-invasive ventilation after extubation in hypercapnic patients with chronic respiratory disorders: randomised controlled trial - The Lancet
World Health Organization (WHO) - Good ventilation protects you from COVID-19 infection: ✓ Open window ✓ Create a cross breeze ✓ Place a fan in front of a window facing the outside
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