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متى ينبغي رمي الكمامة؟ لاصقة ملونة تحل هذه المعضلة
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كمامة جديدة لمواجهة كورونا وتقنية تحل معضلة التخلص منها
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دراسة مثيرة عن فعالية قناع الوجه هل يحمي من كورونا؟
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دراسة: قناع الوجه يحجب تقريباً كل قطرات الرذاذ الكبيرة المحملة بالفيروسات
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Masks block 99.9% of large COVID-19-linked droplets: study The study focused on particles larger than 170 microns in diameter - roughly two to four times the width of a human hair. Muslim worshipers, mask-clad due to the COVID-19 coronavirus pandemic, wait outside the historic al-Azhar mosque in the centre of Islamic Cairo as they arrive to perform the Friday prayers under new pandemic restrictions, in Egypt s capital on 28 August 2020. Picture: AFP.
93 days ago
PARIS - Face masks reduce the risk of spreading large COVID-19-linked droplets when speaking or coughing by up to 99.9%, according to a lab experiment with mechanical mannequins and human subjects, researchers said Wednesday.