Researchers are studying the effectiveness of wearable devices to identify early signs of disease, including COVID-19.
Many people already use devices such as the Fitbit or Apple Watch to measure their heart rate and other physical activity. Researchers are now studying whether this kind of technology could be used to watch for early warning signs of COVID-19.
One such device is being tested at West Virginia University in the United States. Researchers there reported in May that it can identify COVID-19 symptoms up to three days before people start to experience them.