The UK Health Security Agency and Swedish sleep technology company Sleep Cycle on September 3, 2026 published the results of a joint research study evaluating whether cough data collected passively through a consumer sleep app could serve as an early warning signal for respiratory illness in England. The study found that rises in nighttime coughing were often observed around one week before increases in influenza and COVID-19 activity. According to the UKHSA announcement, the passively…