US Patent 11221651 Pandemic wristband

A wearable computing contact tracing, medical tracking and passport device has a main body with a QR code, at least one indicator light, a location tracker, and a processor. The indicator light provides a first visual indication, such as a red light, of when the user has been exposed to a pandemic disease and a second visual indication, such as a green light, of when the user is immune to the pandemic disease.