Cure for Peanut Allergies?

Today, Sam Duty can eat peanut butter sandwiches and candies easily, but at one time in the 9-year-old's life, ingesting peanuts was dangerous and possibly lethal because he was highly allergic to peanuts.
His mother, Angela Duty, worried about even the smallest interactions with peanuts.

"The first small bite of peanut butter — his lips started to swell," Duty said. "It's horrible. You know, you want the best for your children, and you're fighting something you can't see."