Generally, there are three methods to detect COVID-19 in COVID-19, and nasal swab and throat swab are commonly used, because sampling will be more convenient. But there is another test method, which is anal swab. The accuracy of anal swab is actually higher, but sampling is a waste of time and limited by the venue, so anal swab will not be chosen unless necessary. Anal swab usually puts a long cotton swab in it? Behind? Take a sample.
COVID-19 will stay in the respiratory tract for a long time, followed by the rectum. Moreover, the virus will stay in the rectum for a longer time than in the respiratory tract, so the results of anal swab test will be more accurate. However, it is unrealistic to use anal swab for general survey, so it is safer to use anal swab detection method for some high-risk groups.
The reason why Japanese people test anal swabs is that the epidemic situation in China has been controlled, and there are basically no local cases except overseas cases. Therefore, people who enter the country overseas are all high-risk groups, and the number of these people is small. Therefore, targeted screening is needed, and anal swab is more appropriate with high accuracy. This is also to better control the epidemic, and it is not targeted.
Besides Japanese, anal swabs are actually tested in China for other high-risk groups. Moreover, we have also conducted anal swab screening in China. For example, when the epidemic situation in Beijing was serious, thousands of people also received anal swab testing. This is originally a medical means, and there is no targeting and insulting behavior. The existing detection methods in medicine are reasonable. No matter which detection method is used, it is for the accuracy of the results. I have to say that the Japanese are really a bit blx.
Restriction of anal swab The detection result of anal swab is more accurate, but there will be more restrictions when sampling. Because you have to insert a long cotton swab? Behind? Therefore, this involves a privacy issue, which requires sampling alone in a closed space or with the assistance of a doctor. If there are too many people, this detection method will be slow, which will affect the detection progress. Moreover, the discomfort caused by anal swab testing may be stronger than that caused by nasal swab and throat swab, so most people are reluctant to use anal swab. But from a medical point of view, the inspection method of anal swab is actually more scientific and accurate. In fact, there will be such a test when you apply for a health certificate.