File:CovidMaskProba0d015.jpg
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Estimate of effect of face mask: Probaility of transfer Covid19 reduces to 1.5% compared to cases without mask. · April 19 (2020) [1]
References
- ↑ https://www.facebook.com/Introverts4ProgressiveRevolution/photos/a.341783649851779/507084393321703/?type=3&theater Introverts For Progressive Revolution. How the risk of contagion reduces when everyone wears a mask. // 2020.04.19.
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