TOKYO (Reuters) - Japanese researchers showed that masks can offer protection from airborne coronavirus particles, but even professional-grade coverings can't eliminate contagion risk entirely.
Scientists at the University of Tokyo built a secure chamber with mannequin heads facing each other. One head, fitted with a nebulizer, simulated coughing and expelled actual coronavirus particles. The other mimicked natural breathing, with a collection chamber for viruses coming through the airway.
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