"A wearable electronic device that can monitor symptoms in real-time ... it's really hard for real people to do that every day consistently," Rennard said. "It always results in incomplete ...

While there is a whole host of viruses going around, there are thankfully no new viruses to fret about—the ones we have are ...

The three main symptoms of a Covid infection are a new and continuous cough, a temperature above 37.8C and a change in smell or taste. About 85% of people will have at least one of those symptoms.