Doctors warn that masks may not protect against toxic air
As the sales of air purifiers and face masks increase by eight to 10 times in a month, and threefold in the last two days, doctors are still in doubt about the effectiveness of the toxic air 'defences'.
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As the sales of air purifiers and face masks increase by eight to 10 times in a month, and threefold in the last two days, doctors are still in doubt about the effectiveness of the toxic air 'defences'.
