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How to wear a surgical mask to capture viruses? Should the blue side be in or out? - Smart Air

$ 4.50

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Does wearing a surgical mask with the wrong side out affect its ability to capture viruses? We tested four surgical face masks to find out if the blue or white side should face out.

When you wear a mask, there are holes in the sides of the mask, where air gets out and can come in. How does a mask help if your breath comes out

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