(Yicai Global) March 31 --Shanghai had discovered 11 new imported novel coronavirus cases as of yesterday, taking the eastern metropolis' total confirmed Covid-19 cases to 509, the city's health commission said this morning.

Among the new additions there are nine Chinese citizens, one Singaporean and one Brazilian, according to the commission. Six arrived in Shanghai from the United Kingdom, three traveled from France, one came from Brazil and the other from the US.

Authorities have traced 62 people who had been in contact with the patients during their journeys and placed them under quarantine, it added.

Some 21 suspected cases, also involving people who have recently been overseas, are undergoing further tests.

The commission logged no new suspected or confirmed domestically transmitted cases yesterday.

Shanghai has confirmed 509 Covid-19 cases so far, including 170 from overseas. Some 159 of the patients who brought the virus into the city from outside China are being treated, with three in serious condition. Eleven have been discharged upon recovery.

Of the 339 local cases, five patients have died, six are in critical condition and one is stable. A total of 327 patients have fully recovered and been discharged from hospital, the commission said.

Editor: James Boynton