It seriously isn't.
It works.
If everyone wore cheap surgical masks when going out then it would slow the spread and save lives! Add in basic handwashing hygiene and it might slow the replication rate under 1.
You could have one for each day of the week, for reuse purposes. Use them for a month and then replace them.
If everyone could wear a new N-95 mask every day, it would be even better.
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