(CNN) — Your Fitbit could be doing a lot more than tracking your trips to the store — it may help health officials stop the flu from spreading — too.
Researchers tracked deviations in heart rate and sleep patterns which tend to change when a person has the flu and compared that data to flu-like illness rates reported by the Centers for Disease Control and Prevention.
Study authors say this marks the first time heart rate trackers and sleep data have been used to predict the flu or any infectious disease in real time.
Twenty percent of children under five and approximately seven percent of working adults get the flu each year.
It results in 650,000 deaths annually worldwide.
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