Hashbangperl@thomasfuchs masking depends on people too much and isn't as effective as decent air filter systems.. as with all PPE it's the last layer of defense. I'm baffled why governments and employers haven't widely deployed hepa filters and improved ventilation in every office, school and hospital as it would massively reduce not only covid but flu, colds and norovirus.. saving a fortune in lost working days... maybe its just the UK penny pinching but seems to be widespread
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