Video: Why are people allergic to peanuts?

For 1 to 2 percent of the global population, eating a peanut butter and jelly sandwich could be potentially fatal. What makes peanut allergies so lethal, and why is the number of peanut-allergy sufferers on the rise?

This week on Reactions, Andrew Maynard from Risk Bites explains what causes peanut allergies and why we need to rethink how we prevent them.

Check it out here: