Why do mosquitoes bite some people more than others?
Mosquitoes avoid some people because body odor, carbon dioxide, blood type and skin bacteria influence their attraction.
How mosquitoes choose between humans
Mosquitoes rely on visual, thermal, and chemical cues to find a host. Research shows that certain blood types are more attractive to mosquitoes, especially type O, whose scent compounds are more easily detected by the insect’s antennae. In addition, the type and density of skin bacteria matter, as each person’s skin flora produces a unique odor profile. Some individuals emit higher levels of lactic acid, ammonia, or uric acid, which activate mosquito receptors. Alcohol consumption can also alter sweat composition and increase the likelihood of bites. Conversely, smokers or people with lower surface fatty acids may appear less attractive to mosquitoes.Why mosquitoes avoid some people is explained by how personal biochemistry shapes insect behavior. Body heat, sweat composition, odor molecules, and genetics all determine who gets targeted. This is why some people get bitten dozens of times in the same environment while others remain untouched. The best way to protect oneself is to reduce the chemical cues that attract mosquitoes: maintaining skin hygiene, wearing light-colored clothing, and avoiding strong fragrances. From a scientific standpoint, this selective behavior is not random but rather an evolutionary survival strategy that ensures the species’ continuation. /
