I definitely was not expecting this.
Some smartwatches may actually be able to detect signs of Covid-19 before you know you're actually sick. Researchers from Mount Sinai have found that the Apple watch can detect small changes in a users heartbeat. The change may indicate a person has coronavirus up to a week before they get sick.
The PGA Tour started using this technology and it may have helped player Nick Watney detect he was positive.
Are you gonna start paying attention to your heart beat?