In this Dec. 14, 2019, photo released by Syu Kato, Syu Kato takes a selfie in Guam. Curbing the spread of the coronavirus outbreak rests on accurate knowledge of where infected people have been and whom they have come in contact with so they can be tested and treated. Kato, a 16-year-old Japanese computer whiz, has designed an iPhone software application that uses GPS so people can keep their own records of where they've been. (Syu Kato via AP)

In this Dec. 20, 2018, photo released by Kenichi Kato, Syu Kato poses for a photo in Hawaii. Curbing the spread of the coronavirus outbreak rests on accurate knowledge of where infected people have been and whom they have come in contact with so they can be tested and treated. Kato, a 16-year-old Japanese computer whiz, has designed an iPhone software application that uses GPS so people can keep their own records of where they've been. (Kenichi Kato via AP)