BEIJING (AP) -- The Chinese government blasted COVID-19 testing requirements imposed on passengers from China and threatened countermeasures against countries involved, which include the U.S. and several European nations.
"We believe that the entry restrictions adopted by some countries targeting China lack scientific basis, and some excessive practices are even more unacceptable," Foreign Ministry spokesperson Mao Ning said at a daily briefing Tuesday.
"We are firmly opposed to attempts to manipulate the COVID measures for political purposes and will take countermeasures based on the principle of reciprocity," she said.
The comments were China's sharpest to date on the issue. Australia and Canada this week joined a growing list of countries requiring travelers from China to take a COVID-19 test prior to boarding their flight, as China battles a nationwide outbreak of the coronavirus after abruptly easing restrictions that were in place for much of the pandemic.
Other countries including the U.S., U.K., India, Japan and several European nations have announced tougher COVID-19 measures on travelers from China amid concerns over a lack of data on infections in China and fears of the possibility that new variants may emerge.
French Prime Minister Elisabeth Borne defended the tests. Starting Wednesday, anyone flying from China to France will have to present a negative virus test taken within the previous 48 hours and be subject to random testing on arrival.
"We are in our role, my government is in its role, protecting the French," Borne said Tuesday on France-Info radio.
Some Canadian experts have questioned the effectiveness of the testing. Kerry Bowman, assistant professor at the University of Toronto's Temerty Faculty of Medicine, said that people can test positive long after entering the country.
The requirement is "not based on science at this point," he said after Canada announced measures last weekend.
China, which for most of the pandemic adopted a "zero-COVID" strategy that imposed harsh restrictions aimed at stamping out the virus, abruptly eased those measures in December.
Chinese authorities previously said that from Jan. 8, overseas travelers would no longer need to quarantine upon arriving in China, paving the way for Chinese residents to travel.