The newly detected cases are all Vietnamese citizens, who entered the nation via Moc Bai international border gate in the southern province of Tay Ninh, and returned from the Philippines and Japan.
They are now being put into isolation to undergo COVID-19 treatment at local hospitals after they were confirmed to carry the SARS-CoV-2 virus.
With the latest addition, the total imported cases amount to 1,000 and a total of 2,359 people have fully recovered from the virus.
Meanwhile, more than 37,000 people are being quarantined for medical surveillance nationwide, while 70 cases have tested negative for the virus at least one.
According to the National Expanded Immunization Programme, a total 48,256 frontline medical workers and members of community-based anti-COVID-19 groups were inoculated with COVID-19 vaccine from March 8 to 30.
COVID-19 vaccination will be conducted in a larger scale in the time ahead.