The difficulty many people have getting tested for SARS-CoV-2 and delays in receiving test results make early warning of possible COVID-19 infections all the more important, and data from wearable health and fitness devices shows promise for identifying who might have COVID-19. Today’s wearable device gather data about physical activity, heart rate, body temperature and quality of sleep. This data is typically used to help people track general well-being. Smartwatches are the most common type of wearable. There are also smart wrist bands, finger rings and earbuds. Smart clothing, shoes and eyeglasses can also be considered “wearables.” Popular brands include…

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