More than 5,000 Chinese workers who returned to Vietnam after the Lunar New Year holiday are being monitored for signs of coronavirus.
They are being isolated in their companies' dormitories and hotels, while suspected infection cases are quarantined at medical facilities.
Vietnam has already quarantined a rural community of 10,000 people near the capital Hanoi over fears that the virus could spread there.
The South-East Asian country declared a public health emergency over the epidemic on February 1 and has banned all flights to and from China.
NASA shakes up moon programme with new test mission
Pakistan bombs targets in Afghan cities, minister calls it 'open war'
Indian court throws out alleged corruption case against opposition leader
Bill Clinton to give private testimony to Congress about Epstein
Hillary Clinton tells panel she has no information on Epstein
