Scientists studying the SARS-CoV-2 coronavirus -- which causes COVID-19 -- believe they've discovered why face masks might help limit transmission of the virus.
from WebMD Healthhttps://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/article_thumbnails/news/2020/03_2020/covid19/650x350_covid19_5.jpg https://ift.tt/3eZd8jU
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