Why do mosquitoes bite some people more often than others?

You’re out with friends, everyone’s having a great evening… except you, frantically scratching your legs. Another bite! And another. And your neighbor has nothing. Why you? Is it your blood? Your smell? Your bad luck? Not quite. Mosquitoes don’t attack randomly. They follow a logic… and fortunately, it’s possible to outsmart their preferences.
What Mosquitoes Love About Your Home (and What You Don’t Know)

A “Greedy” Blood Type
Yes, mosquitoes have their preferences. Blood type O is at the top of their list, closely followed by blood type AB. And if you’re among the 80% of the population who shed blood type markers through their skin, you’re even more at risk.

You’re breathing… too heavily. Mosquitoes can sense the carbon dioxide we exhale from up to 50 meters away. The bigger, more active, or out of breath (due to exercise or heat), the more they release. For them, it’s “like turning on a giant neon sign that says ‘Open Buffet.'”

The warmth of your skin attracts them. Mosquitoes look for warm areas of your body to land on. That’s why they often target your legs or head. Exercise or outdoor activity, especially in summer, is like a red carpet to them.

Sweat: an irresistible scent.