Local doctors say they have examined samples of the nose and anus. It has a higher detection rate in anal samples. That means anal sample testing is more effective. The reason, they say, is that the coronavirus lasts longer in the anus than in the lungs. But many in China have called the practice "embarrassing." "I feel lucky to have had such an ordeal," one wrote on online social media.
Another wrote, ‘I had to give anal samples twice. The first time I was so scared that one of the nurses didn't dare take my sample the second time.' However, the CCTV report confirmed that this method of collecting samples from the anus would not be widely applied. Source: Times of India.