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U.S. Department of Energy @ENERGY
A study from @argonne and @UChicago suggests that masks made of high thread-count cotton with natural silk fabric or a chiffon weave can effectively filter out aerosol particles––if the fit is good https://t.co/2StckZr0q3 https://t.co/dEHD6yNBYH — PolitiTweet.org