Once someone checks into a location, health officials are given alerts so they can look up the person’s profile. If the Magic Band display shows green, that person can proceed through the checkpoint. If it turns a different color, a medical investigation begins. The reasons could include a person forgetting to fill out the symptom self-assessment, leaving a room despite nursing symptoms or breaking quarantine. Despite that technology, though, the NBA and Disney are not using these devices to contact trace or access a person’s location that are not part of the designated checkpoints. “The Magic Band isn’t holding any of your health data. That is not on the band at all,” Ryan said. “The band is a unique identifier that says a person is at this location at this time. There’s no memory on a Magic Band.”