Virologists at the University of Tokyo say that while masks can offer protection from airborne COVID-19 particles, their effectiveness varies. VOA Correspondent Mariama Diallo has more on the results of the new research.
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Virologists at the University of Tokyo say that while masks can offer protection from airborne COVID-19 particles, their effectiveness varies. VOA Correspondent Mariama Diallo has more on the results of the new research.
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