After the shutdown, the testing and tracing. “ Trace, test and treat is the mantra … no lockdowns, no roadblocks and no restriction on movement ” in South Korea. “ To suppress and control the epidemic, countries must isolate, test, treat and trace ,” say WHO. But what does “tracing” look like exactly? In Singapore , they use a “ TraceTogether ” app, which uses Bluetooth to track nearby phones (without location tracking), keeps local logs of those contacts, and only uploads them to the Ministry of Health when the user chooses/consents, presumably after a diagnosis, so those contacts can be alerted. Singapore plans to open-source the app. In South Korea, the government texts people to let them know if they were in the vicinity of a diagnosed individual. The information conveyed can include the person’s age, gender, and detailed location history . Subsequently, even more details may be made available : The level of detail provided by @Seoul_gov for each and every COVID-19 case in