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Neither surgical nor cotton masks effectively filter SARS COV-2

Both surgical and cotton masks were found to be ineffective for preventing the dissemination of SARS-CoV-2 from the coughs of patients with COVID-19. A study conducted at two hospitals in Seoul, South Korea, found that when COVID-19 patients coughed into either type of mask, droplets of virus were released to the environment and external mask surface. A brief research report is published in Annals of Internal Medicine.

Source: Neither surgical nor cotton masks effectively filter SARS COV-2

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