U.S. Commerce Dept. @CommerceGov
Cloth made from 100% cotton may perform better than synthetic fabrics at blocking virus-sized particles, per research by @NIST and @smithsonian. Learn more about their research here: https://t.co/yTlhtBdkK5 . https://t.co/i8Kpzt7vDI — PolitiTweet.org