China subjects some travelers to anal swabs, angering foreign governments

Japanese officials said on Monday that they had formally asked China to exempt Japanese citizens from the test, adding that some who had received it complained of “psychological distress.” And the United States State Department last moth said it had registered a protest with the Chinese government after some of its diplomats were forced to undergo anal swabs, though Chinese officials denied that.

It is not clear how many such swabs have been administered or who is subject to them. Chinese state media has acknowledged that some arrivals to cities including Beijing and Shanghai are required to take the tests, though the reports said the requirements might vary depending on whether the travelers were deemed to be high-risk.

Chinese experts have suggested that traces of the virus may survive longer in the anus than in the respiratory tract and that samples of the former may prevent false negatives.