earlier replies
Replying to @MarylouiseMcla1 @Covid19NSW @WHO
What’s the absolute risk reduction, given the current prevalence of disease?
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Replying to @DrAshSays @Covid19NSW @WHO
DrAsh- Somewhere between 10-70% depending on quality. The WHO recommends cloth mask with 3 layers and this should provide protection towards the higher end of this range.

Jun 17, 2020 · 8:28 AM UTC

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