A team of WHO experts investigating the origins of the coronavirus toured a propaganda exhibition celebrating China's recovery from the pandemic in Wuhan on Saturday, after a meeting at the hospital that treated the first confirmed Covid-19 cases over a year ago.

World Health Organization experts emerged from quarantine in China Thursday to begin a long-awaited investigation into the origins of the devastating coronavirus pandemic, which has shown no signs of slowing down.

The number of coronavirus cases in the Chinese city where the pathogen was first detected may have been 10 times higher than official figures suggest, according to a study by health authorities in Wuhan.

After 11 weeks of lockdown, people went outdoors and by the thousands boarded the first trains and planes leaving Wuhan as the last restrictions on movement were lifted Wednesday in the Chinese city where the coronavirus pandemic began.

Wuhan's unprecedented lockdown was a model for countries trying to stop the coronavirus. With the restrictions ending, Hubei's provincial capital begins another experiment: resuming business and ordinary life while preventing more illnesses.

World powers were on a war footing against the spiralling coronavirus pandemic on Thursday despite a sign of hope from China where zero new domestic cases were reported for the first time.