Image: PA Image: PA NEARLY 10 MILLION people have been tested for coronavirus as part of a three-week blitz in Wuhan, where Covid-19 was first detected late last year.The city found no infections among 1,174 close contacts of the people who tested positive, suggesting they were not spreading the virus easily to others.
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. If those tested previously are included, virtually everyone above 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 campaign was launched 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 a 10-week lockdown.
Clarence Tam, an assistant professor of public health at the National University of Singapore, called the results reassuring but said more information is needed about the value of this kind of mass screening when the risk is already low.
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