Wearable tech devices could soon deliver Covid track and trace alerts null

Wearable devices such as wristbands and smartwatches could soon be used as part of Bluetooth-based track and trace systems designed to tackle the spread of Covid-19.

Exposure Notification Systems (ENS) work by alerting users if they have been in close proximity to someone who is later diagnosed with Covid-19. This is achieved by sharing anonymised device IDs over a short-range Bluetooth connection.