«An elevated respiratory rate, or breathing rate, has been shown to be a useful biomarker for the early detection of COVID. Respiratory rates can be estimated using a method called photoplethysmography which requires only a single point of contact (for example, your finger or wrist).»

«Photoplethysmography is often susceptible to external factors such as ambient light, pressure or motion. So most studies seeking to use this method to detect COVID have focused on monitoring people during sleep.»

«Electronics company Fitbit analysed the nocturnal respiratory rates of thousands of users of their devices to understand whether this measure could aid COVID detection. They found that within a seven-day period (from one day before symptom onset, or one day before a positive test for participants without symptoms), a portion of people with COVID showed at least one measurement of elevated respiratory rate.»

Article written by The Conversation



The Conversation