https://techcrunch.com/2021/02/09/mount-sinai-study-finds-apple-watch-can-predict-covid-19-diagnosis-up-to-a-week-before-testing/

A new study from Mount Sinai researchers published in the peer-reviewed Journal of Medical Internet Research found that wearable hardware, and specifically the Apple Watch, can effectively predict a positive COVID-19 diagnosis up to a week before current PCR-based nasal swab tests.

The investigation dubbed the ‘Warrior Watch Study,‘ used a dedicated Apple Watch and iPhone app and included participants from Mount Sinai staff. It required participants to use the app for health data monitoring and collection, and also asked that they fill out a day survey to provide direct feedback about their potential COVID-19 symptoms, and other factor including stress.