The Fitbit on your wrist not only counts your steps and minutes of sleep, it can also help tell if you are coming down with the flu – and warn health authorities to get ready to help.

An estimated 69,000 to 84,000 Americans were hospitalized due to the flu in the last three months, the Centers for Disease Control and Prevention (CDC) said.

The U.S. flu outbreak worsened over the past week as more people headed to doctors’ offices and emergency rooms, with hospitalizations at the highest in nearly 10 years, U.S. health officials said.