A New Theory Asks: Could a Mask Be a Crude ‘Vaccine’?

Scientists float a provocative — and unproven — idea: that masks expose the wearer to just enough of the virus to spark a protective immune response.
By BY KATHERINE J. WU from NYT Health https://ift.tt/327E3GE
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Coronavirus Risks and Safety Concerns, Coronavirus (2019-nCoV), Masks, Vaccination and Immunization, Immune System, your-feed-health, your-feed-science, Protective Clothing and Gear
Source New York Times
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