How to choose face masks for Anti-Covid-19?

featured image of face mask

Technical explanation of the difference between different medical masks A study published in the Journal of the American Medical Association in September 2019, compared the effectiveness of N95 masks with “medical masks” for protection against influenza for U.S. outpatient medical staff. In this four-year trial, 8.2% of medical staff wearing N95 masks were infected with influenza, […]

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