New Study Suggests Apple Watch Heart Rate Sensor Can Predict COVID-19 Up to a Week Before a Swab Test

A new study by Mount Sinai researchers has found that an Apple Watch can effectively predict a positive COVID-19 diagnosis up to a week before current PCR-based nasal swab tests (via TechCrunch).
Published in the peer-reviewed Journal of Medical Internet Research, the "Warrior Watch Study" involved several hundred Mount Sinai healthcare workers using a dedicated Apple Watch and iPhone app for personal health data monitoring and collection.
All participants were also required to fill out a daily