adjl posted... Ever try blowing out a candle with a mask on?
Put your glasses on. Blow your nose. Did droplets get on your glasses?
We're not talking about blowing out candles. We're talking about aerosol droplets escaping through the open sides, as well as directly through the weave of cloth and paper masks. Who wears fitted respirator masks? Masks are symbolic, not magical.
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If ballet was easy, it would be pointe-less