Many people with a peanut allergy don’t realize that they may no longer have it.

Peanuts, and peanut butter in particular, are among the most ubiquitous elements in a child’s diet. So, when a child is allergic to it, it can be a unique annoyance for parents. That means no PB&J for lunch — but also a laundry list of logistical tasks, from having to check in with parents every time their child goes to a friend’s house to communicating with school officials.