China's new test, being required in some cases. Remember it was on China's advice experience that we threw out the playbook on NPIs and adopted lockdowns.
China Is Now Requiring COVID-19 Tests Taken by Anal Swab
The upside is it’s reportedly more accurate. The downside is the obvious.slate.com
The article quotes the WP that "a stool sample should be taken from patients, and if that is not possible, to do an anal swab".