SEATTLE - Apple is teaming up with researchers at the Seattle Flu Study and the University of Washington to test if everyday devices, such as an Apple Watch or an iPhone, can be used to predict illnesses like COVID-19.The Seattle Flu Study is an infectious disease surveillance program started by the Brotman Baty Institute and researchers at The University of Washington School of Medicine (UW Medicine), the Fred Hutchinson Cancer Research Center, and Seattle Children’s, to track the spread of bacterial and viral respiratory infections in the Seattle area.The study, which was announced in September of 2020, has officially started enrolling participants to "learn if physiological measurements from Apple Watch, like heart rate or blood oxygen,.