Mosquito bites often seem unfair, but they are driven by biology rather than chance.

Only female mosquitoes bite humans, as they need blood to reproduce, and they have evolved to identify certain people more easily.

A major trigger is carbon dioxide. As the article explains, “Every breath releases CO₂, and mosquitoes are extremely sensitive to it.”

People who are taller, have more body mass, or are physically active release more CO₂ and body heat, making them easier targets.

Body odor also matters. Each person’s skin bacteria create a unique scent, and

“Certain combinations are especially appealing to mosquitoes, and this has nothing to do with cleanliness.”

Blood type plays a role as well, with research showing people with type O blood are bitten more often.

Exercise increases risk because sweat and lactic acid attract mosquitoes, which is why bites often increase after physical activity.

Environmental factors like standing water, clothing color, and time of day can intensify exposure.

Understanding these factors explains why bites feel personal and helps guide prevention strategies.