After the nasal test for Covid-19, China is now imposing a new variant of the test on travelers arriving from abroad: the anal test. According to the American news magazine Newsweek, More than one million Beijing residents have already undergone the Covid anal test. The method is considered more accurate and increases the chances of detecting the virus. The test helps detect infected people, because the coronavirus remains in the anus longer than in the airway, said Dr. Li Tongzeng of You’an Hospital in Beijing.