In Singapore, a group of workers has been given an important job in the fight against the new coronavirus. The workers are called contact trackers. Their job is to interview infected individuals as soon as possible after the patients are confirmed to have COVID-19 the disease the virus causes. The contact trackers speak with hospitalized patients over telephone. They are separated from infected individuals by two glass walls. The information they collect is then used to find out as much as possible about the patients’ movements and contacts during the two weeks before they were hospitalized.