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Director / Editor: Victor Teboul, Ph.D.
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CDC says masks must fit tightly – and two are better than one

By Scott N. Schiffres, Assistant Professor of Mechanical Engineering, Binghamton University, State University of New York
How well your mask works depends on how well it fits. Wearing two snug masks made of different materials offers 95% protection from exposure to aerosols that could contain the coronavirus.The Conversation


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