Covid ‘airborne’: Use N95 or KN95 masks, keep alternating every 24 hours, says Infectious Diseases expertsource https://www.indiatoday.in/coronavirus-outbreak/story/which-mask-best-covid-corona-lancet-report-infectious-diseases-expert-dr-faheem-younus-1792226-2021-04-18?utm_source=rss
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