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In the COVID-19 era, the importance of materials in countering the infection using face masks is highly felt important by people, Dr Seshadri Ramkumar, Professor, Texas Tech University

Professor researches effectiveness of face masks against particles similar in size to
coronavirus. Seshadri Ramkumar’s data shows three-ply face masks can filter out 60-80% of
simulated viral particles between 150 and 30 nanometers in diameter, respectively.