SHANGHAI: Hundreds of flights at one of China's busiest airports were cancelled Tuesday as Shanghai raced to bring a local coronavirus outbreak under control.

Health officials have tested thousands of staff at Pudong International Airport since a small cluster of Covid-19 cases in the city was linked to several cargo handlers.

Shanghai has reported seven local infections linked to the airport this month, with most cases found in the past few days. The outbreak has sparked plans to give high-risk workers at the travel hub an experimental vaccine China has already been providing to state employees, international students and essential workers heading abroad since July.

On Tuesday, figures from data services firm VariFlight showed that over 500 flights out of Pudong Airport had been called off - nearly half the day's scheduled flights.

Almost half of scheduled inbound flights were also cancelled.