What blood type do mosquitoes like?

Mosquitoes are attracted to the carbon dioxide (CO2) and lactic acid that humans and animals emit when they breathe, as well as to body heat, moisture, and other chemicals present in sweat. The type of blood that a mosquito prefers is not determined by its blood type, but by the combination of these factors. Mosquitoes will bite anyone who presents an attractive combination of these cues, regardless of their blood type.