Two stevedores in east China's port city of Qingdao were reported as asymptomatic COVID-19 cases on Thursday, said the municipal health commission on Friday
The two workers, aged 40 and 45, had both handled imported frozen seafood on Sept. 19. Nucleic acid tests revealed the two were positive for novel coronavirus on Thursday.
So far, 132 close contacts have been tracked and put under quarantine
The municipal health commission said the batch of imported products had not yet entered the market and has been sealed.
A total of 1,440 samples taken from the cold chain products and environment have been collected and submitted for inspection. Some samples have tested positive.