Coronavirus: Hong Kong bans ‘selfish’ valve-style masks from Covid-19 quarantine hotels

Hong Kong health authorities have banned from quarantine hotels the use of “selfish” masks with air valves after the design was blamed for a cross infection at one of the Covid-19 facilities.Authorities and experts have said the masks are only suitable for filtering out dust and contaminants in industrial settings.Hong Kong’s leading microbiologist, Yuen Kwok-yung, on Monday described the masks as “selfish” on the basis they only protected the user and not those around them because the valve…


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