Were you a cigarette smoker? That seems to be a small deterrent.

As someone that is the only one bitten by mosquitoes while standing with a dozen people, I've looked this up. All mosquitos are attracted to the scent of beer, especially if you're talking, especially if you're wearing dark clothing, especially if you're O neg blood type, especially if you're a woman, and especially if you're pregnant.

Edit: I'm all these things except pregnant.