The use of face masks to help slow the spread of COVID-19 has been widely recommended by health professionals. This has triggered studies exploring the physics of face mask use and disease transmission, as well as investigations into materials, design, and other issues affecting the way face masks work.
In Physics of Fluids, by AIP Publishing, investigators looked at research on face masks and their use and summarized what we know, to date, about the way face masks filter or block the virus. They also summarize design issues that still need to be addressed.
One key aspect of face mask function involves the size of fluid droplets expelled from the nose and mouth when a person talks, sings, sneezes, coughs, or even simply breathes.
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