China may have found a more accurate way of conducting Covid-19 tests, inserting a swab in to your rectum. This new way of testing attempts to get a fecal sample, if nothing, a swab is inserted an inch or two into the rectum. An anal swab test decreases the amount of false-negative results. You can understand that anal swab tests aren't as expedient as a throat or nose swab, those in quarantine will get both.