Wearables and AI detect early illness signs

Smartwatches from Apple, Whoop, and Oura can monitor sleep, skin temperature, and respiratory rate. They detect atrial fibrillation with 84 percent accuracy in one Apple Watch study. A Texas A&M and Stanford study found smartwatches may detect early COVID-19 and influenza within hours of infection. AI features like Oura's Symptom Radar and Apple's Vitals compare data to baselines.