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A comment on Amazon refuses to sell book on Covid-19 and lockdowns. Parent comment
Here: https://www.livescience.com/face-masks-eye-protection-covid-...
> With face masks, the chance of infection or transmission was 3% with a mask compared with 17% without a mask, a reduction of more than 80%. And for eye protection, the chance of infection or transmission was 6% with protection and 16% without.
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Here: https://www.livescience.com/face-masks-eye-protection-covid-...
> With face masks, the chance of infection or transmission was 3% with a mask compared with 17% without a mask, a reduction of more than 80%. And for eye protection, the chance of infection or transmission was 6% with protection and 16% without.