Professor researches effectiveness of face masks against particles similar in size to Coronavirus

摘要

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. On Tuesday (July 27), the Centers for Disease Control and Prevention (CDC) issued new mask guidelines, recommending that Americans resume wearing masks indoors in areas with high coronavirus transmission, regardless of vaccination status. While vaccinations reduce the risk of COVID-19 transmission, it is still possible for vaccinated individuals to spread the Delta variant to those who are unvaccinated. Seshadri Ramkumar, professor of chemical countermeasures and advanced materials in Texas Tech University's Department of Environmental Toxicology, has gathered data on the effectiveness of face masks in reducing the spread of COVID-19.