clipped from: www.msnbc.msn.com 
We all know that one person who comes home from the camping trip without a single bug bite. Perhaps they advise their unlucky mates to eat more garlic, or fewer bananas.
But it may be that these folks are born with a scent that keeps mosquitoes and other biting insects away. Recent research has isolated chemicals emitted by "bug-proof" individuals, which appear to counteract the odors that hungry bloodsuckers generally home in on.
The study showed "unequivocally that there are compounds that interfere with the normal attraction that mosquitoes have towards humans," said John Pickett from Rothamsted Research in England.
Pickett told LiveScience in a telephone interview that he and his colleagues are working on a mixture of these compounds that could serve as a natural insect repellent.