Evidence is growing that some cases of peanut allergy can be avoided by starting children on peanut foods early in life. The modern concern for this affliction follows better-testing developed in the second half of the last century. It became best practice for kids to avoid things like peanut butter. But now doctors say many cases of full-blown allergy are avoidable if a careful regime of peanut foods are given early enough. In this AP video, a family is finding that their daughter is likely to never have to worry about it. But their sons are at risk because they were introduced to peanuts too late in life.