Many people have seen it happen: one person ends an outdoor gathering covered in mosquito bites while others are untouched. This isn’t bad luck—mosquitoes really do have favorites.
Science shows mosquito attraction is driven by biology and body chemistry. Only female mosquitoes bite, and they use a highly developed tracking system to locate the best host.
Why mosquitoes prefer some people:
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Carbon dioxide (CO₂): Mosquitoes can detect CO₂ from up to 100 feet away. Taller people, those with higher body mass, or anyone exercising emits more, making them easier targets.
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Body odor and skin bacteria: The mix of bacteria on your skin creates a unique scent. Some combinations are more attractive to mosquitoes.
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Blood type: Studies suggest people with Type O blood are bitten more often than those with Type A.
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Heat and movement: Exercise increases body heat, sweat, and lactic acid—all strong mosquito attractants.
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Clothing color: Dark colors like black and navy attract mosquitoes more than light-colored clothing.
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Alcohol: Drinking beer has been shown to increase mosquito attraction.
Genetics plays a major role—research estimates that 60–70% of mosquito attractiveness is inherited.
How to reduce bites:
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Use EPA-approved repellents (DEET, picaridin, or oil of lemon eucalyptus)
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Wear loose, light-colored clothing
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Avoid outdoor activity at dawn and dusk
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Eliminate standing water near your home
Mosquito preference isn’t personal—it’s biological. Understanding why they target certain people can help you take better precautions.
