As said by someone else, tests are in short supply. So other ways are being tested, like testing wastewater[0]. [0]: https://www.sciencedaily.com/releases/2020

As said by someone else, tests are in short supply. So other ways are being tested, like testing wastewater[0]. [0]: https://www.sciencedaily.com/releases/2020/03/200331092713.htm https://www.sciencedaily.com/releases/2020/03/200331092713.h...