Study: A good cloth mask is a powerful weapon against the coronavirus

Face coverings, including masks made of cloth, are highly effective in protecting the people who wear them as well as those around them, according to a new study from Linsey Marr, a leading aerosol scientist at Virginia Tech University. “Filtration works both ways,” Marr said. Testing 11 different types of face coverings (nine cloth masks made from coffee filters, cotton and other materials, a surgical mask and a face shield), Marr and co-author…