Japanese researchers have shown that masks can offer protection from airborne coronavirus particles, but even professional-grade coverings can’t eliminate contagion risk entirely, reports Japan Times.
What does the study say?Scientists at the University of Tokyo built a secure chamber with mannequin heads facing each other. One head, fitted with a nebuliser, simulated coughing and expelled actual coronavirus particles—the other mimicked natural breathing, with a collection chamber for viruses...
https://mfame.guru/watch-masks-cant-eliminate-contagion-risk-entirely-says-researchers/