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N95? KF94? Which mask is best at protecting against Covid-19

Here are some facts to consider when choosing a mask. N95? KF94? Which mask is best at protecting against Covid-19
A combination of four images shows a surgical mask (top R), a self-made protective mask (top L), a FFP3 Respirator mask (bottom L) and a FFP2 Respirator mask (bottom R) in these illustrations taken, April 6, 2020. Reuters
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Reuters
Published at : January 19, 2022
Updated at : January 19, 2022 13:17

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