https://wccftech.com/singapore-governments-covid-19-tracing-app-is-now-open-sourced/

Due to its proximity to China and the amount of travel that happens between the two countries, Singapore was hit badly by the COVID-19 epidemic. To curb the spread of the disease, government officials employed a host of tactics, one of which involved an app that could help authorities contact trace infected people better. Looking at the current state of affairs in the country, it appears that the app (and some other measure) were a roaring success. Now, the Singapore government has offered to make the app open source for developers. Dr. Vivian Balakrishnan Minister-in-charge of the Smart Nation Initiative says:

"We believe that making our code available to the world will enhance trust and collaboration in dealing with a global threat that does not respect boundaries, political systems or economies. Together, we can make our world safer for everyone.