Karla Walsh is a freelance writer, editor and restaurant brand manager based in Des Moines, Iowa, where she reports on fitness trends, wellness research, psychology, and healthy recipes. She is a level one sommelier and is certified by AFAA for group fitness and NASM for personal training. Her writing has been published on ReadersDigest.com, Shape.com, EatThis.com, WomensHealthMag.com, EatingWell.com, BHG.com as well as in Runner’s World, Better Homes & Gardens, AllRecipes and more. Find her on Instagram @karlaswalsh.
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6 Times You Have to Wear A Face Mask—And 3 Times You Don’t

Medical pros weigh in on when you *really* need to cover your nose and mouth with a mask and when you can safely skip doing so.