1 in 50 -- That's the estimated proportion of children worldwide afflicted with potentially deadly peanut allergies. A rise in the allergy has led to peanut-free zones in schools and caution about foods made near others that contain peanuts. Now there is hope the malady can be overcome. In a recent study, 80 percent of kids with the allergy who participated were able to build tolerances by consuming gradually larger bits of peanuts. It's easy to lament modern problems like peanut allergies, but modern solutions are a reason to cheer.