I was made aware of this just 5 minutes ago. Sorry, if this was already mentioned on this ML in the past few days.
Singapore decided to release their Tracing-App under GPL-3.0 [0], which obviously would establish better trust and would benefit other countries and regions as well, as the software (or parts of it) could be re-used, being in line with PMPC[1] as well as the FSFE's call to release any COVID19 Tracking App under a Free Software License.
Kind regards and stay healthy, Jan
[0] https://github.com/opentrace-community [1] https://publiccode.eu/ [2] https://fsfe.org/news/2020/news-20200402-02.html