The female mosquito draws blood from warm blooded animals...which includes us, because they need the extra protein for egg laying. A mosquito has difficulty fighting against even a minimal wind, so if you are sitting outdoors, you might try setting up a fan to create a breeze around you..the larger the fan, the slower you can run it and the more quiet it will be. Additionally, if you mix a meat tenderizer into a paste with water, dab some on the bitten area and it will draw much of the insect's injected fluid out just as it does moisture from meat. Incidentally, the 'itch' you feel following a bite is from a fluid the insect injects into the skin to stimulate the blood circulation, so it's not sucking the blood from you, you're pumping it to them......