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How Effective are Face Masks? They Block 99.9% of Large Covid-19 Droplets FOLLOW US ON: Face masks reduce the risk of spreading large Covid-linked droplets when speaking or coughing by up to 99.9 percent, according to a lab experiment with mechanical mannequins and human subjects, researchers said Wednesday. A woman standing two metres (yards) from a coughing man without a mask will be exposed to 10,000 times more such droplets than if he were wearing one, even if he is only 50 centimetres away, they reported in the journal Royal Society Open Science. There is no more doubt whatsoever that face masks can dramatically reduce the dispersion of potentially virus-laden droplets, senior author Ignazio Maria Viola, an expert in applied fluid dynamics at the University of Edinburgh s School of Engineering, told AFP.

United statesIgnazio maria violaMaria violaUniversity of edinburgh school engineeringWorld health organizationRoyal society open scienceInstitute for health metricsRoyal society openHealth metricsஒன்றுபட்டது மாநிலங்களில்மரியா வயலபல்கலைக்கழகம் ஆஃப் எடின்பர்க் பள்ளி பொறியியல்உலகம் ஆரோக்கியம் ஆர்கநைஸேஶந்அரச சமூகம் திறந்த அறிவியல்நிறுவனம் க்கு ஆரோக்கியம் அளவீடுகள்அரச சமூகம் திறந்த