Source: The Authors Copyright: The Authors / Seiji Bito URL: https://formative.jmir.org/2022/7/e37720 License: Creative Commons Attribution (CC-BY) Tokyo, Japan, July 25th, 2022__COCOA, a mobile app developed and promoted by the Ministry of Health, Labour and Welfare in Japan (MHLW) to counter the spread of COVID-19, is an app that allowed individuals with positive test results to register themselves as infected using the app and Bluetooth function of their smartphones. The app notifies the users if they had come into close contact with a registered individual. Unlike those developed and operated in South Korea and China, this app was not designed to track the movement history ofRead More →