“I would guess flavor?”
I repeat ....
How does the mosquito know your blood type before it bites you ....
No clue. As I said, it’s just something I’d heard.
I did know a lady years ago who had AB Negative, and she never got bit. And this was in Dallas during the Spring and Summer.
Smell
Blood-type markers are chemicals released by people of a specific blood type so if someone with AB blood emitted a marker, it would be different than that released by B. One study found persons with Type O blood suffered more mosquito landings because of the odorant markers they emit than any other blood type, making their juices a hot commodity for blood banks, as well as Asian Tiger Mosquitoes, which carry West Nile Virus. Not only were Type Os more likely to be landed on, but the study found that for any blood type, people who secreted a chemical marker about their blood type through their skin (both blood type and secretor status are determined by genes) were bitten much more than non-secretors; 24 percent in the case of the Type Os. Other researchers estimate about 15 percent of the population, based on their genes, dont emit chemical markers of their blood type through their skin and saliva, so something else has to be calling the mosquitoes to them.