http://www.thejakartapost.com/life/2021/08/27/mexican-researchers-say-they-created-facemask-that-neutralizes-covid-19.html
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8/26/21 at 9:56pm
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UNAM is calling the triple-layered antimicrobial facemask SakCu; Sak means silver in Mayan and Cu is the chemical symbol for copper.
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