Mosquitoes seek out carbon dioxide (which in part is why they’re so good at finding us), and the more we exhale, the more carbon dioxide we send into the air, inviting bugs our way. If you were to do a vigorous workout outside, you might breathe more heavily and exhale more carbon dioxide, which might usher in mosquitoes, Dr. Potter said. Sweat sends a powerful signal to mosquitoes too, Dr. McBride added — particularly sweat that’s lingered for a few hours, mixing with bacteria on our skin. And if you’ve had a few beach-side beers or happy hour margaritas, you might also emit some alcohol in your sweat, Dr. Bazzoli said, which can lure mosquitoes in. Some fragrant personal care products such as certain perfumes and scented soaps and lotions (including sunscreens) can attract mosquitoes, Dr. Bazzoli said, so if you’ll be spending time outdoors when mosquitoes are around, try to use products that are fragrance-free, and consider skipping the perfume completely.

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Persons: Christopher Bazzoli, haven’t, Bazzoli, —, Potter, Sweat, McBride, you’ve Organizations: Cleveland Clinic, Research