Wrist-worn health trackers ‘could spot Covid-19 before symptoms appear’

A new study says Covid can be picked up by health trackers worn on the wrist (PA)

Health trackers worn on the wrist could pick up Covid-19 days before symptoms even appear, research suggests.

The trackers monitor changes in skin temperature, heart and breathing rates and could be combined with artificial intelligence (AI) to offer a diagnosis, according to a new study.