Omicron may be on your next flight. Here’s how to protect yourself.

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Cloth masks should not be considered for flying; they aren’t even allowed on some airlines, especially in Europe. Lin Chen, director of the Travel Medicine Center at Mount Auburn Hospital in Cambridge, Mass., and an associate professor at Harvard Medical School, said N95 masks are the best but not the most comfortable. She said KN95s are “quite good” also. For those who want to use a surgical mask, adding a cloth mask on top can help reduce any gaps.

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