An estimated 50 million people in the United States, approximately 20 percent of the population, suffer from allergies -- a figure that has doubled in the last decade.
At this moment millions of preschoolers and kindergartners across the nation are looking forward to celebrating Halloween, dressing up and filling their trick-or-treat bags with candy. For most of them, the worst they will suffer if they over-indulge is a tummy ache.