City where coronavirus was first detected late last year, began tests in May amid fears of second post-lockdown wave.
The central Chinese city of Wuhan, where the coronavirus was first detected late last year, says it has tested nearly 10 million residents in an unprecedented 19-day campaign to check an entire city.
The effort identified just 300 positive cases, none of whom had symptoms. None of the 1,174 people identified as close contacts of those patients was found to have the disease either, suggesting they were not spreading it easily to others.
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That is a potentially encouraging development because of widespread concern that infected people without symptoms could be silent spreaders of the disease.
“It not only makes the people of Wuhan feel at ease, it also increases people’s confidence in all of China,” Feng Zijian, vice director of China’s Center for Disease Control and Prevention, told state broadcaster CCTV.
There is no definitive answer yet on the level of risk posed by asymptomatic cases, with anecdotal evidence and studies to date producing conflicting answers.
Wuhan, which was sealed off for months, was by far the hardest-hit city in China, accounting for more than 80 percent of the country’s deaths, according to government figures.
A city official announced on Tuesday that the city had completed 9.9 million tests from May 14 to June 1. If those tested previously are included, nearly everyone over the age of five in the city of 11 million people has been tested, said Li Lanjuan, a member of a National Health Commission expert team.
“The city of Wuhan is safe,” she said at a news conference with city officials.
The 900 million yuan ($125 million) city-wide testing campaign began after a small cluster of cases was found in a residential compound, sparking concern about a possible second wave of infections as Wuhan emerged from its two-and-a-half-month lockdown.
The rapid testing of so many people was made possible in part through batch testing, in which samples from up to five people are mixed together, Xinhua reported. If the result is positive, then the people are individually tested.
National resources were also mobilised to help, said Wang Weihua, deputy director of the Wuhan Health Commission, according to Xinhua. Together, these efforts raised Wuhan’s daily testing capacity from 300,000 to more than one million, she was quoted as saying.
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