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/https%3A%2F%2Ftf-cmsv2-smithsonianmag-media.s3.amazonaws.com%2Ffiler_public%2Fc9%2F11%2Fc9113618-7018-4eb9-9516-4d7c633b266b%2Fgettyimages-1261921921_web.jpg "What You Need to Know About Covid Masks in the Age of Omicron | Science| Smithsonian Magazine")
What You Need to Know About Covid Masks in the Age of Omicron | Science| Smithsonian Magazine
Ministers know which masks provide the best Covid protection – why not tell the UK public? | Claire Horwell | The Guardian
Testing whether uncertified N95 masks are effective | MIT News | Massachusetts Institute of Technology
