The Germany expert entered Can Tho airport on flight VJ2527 from the Philippines and was quarantined immediately after entering Ben Tre province.
He is being isolated for the COVID-19 treatment at a tuberculosis and lung disease hospital in Ben Tre province after his test result came back positive for the virus.
The remaining six Vietnamese citizens are returnees from Japan and through Ha Tien International Border Gate in Kien Giang province. They are in quarantine to undergo treatment at local hospitals.
With the latest addition, the overall number of imported cases amounted to 1,144 nationwide, including 910 since the resurgence of the disease in late January.
More than 36,230 people are being quarantined for medical surveillance across the nation, while 52 cases have tested negative for the virus at least one.
According to the National Expanded Immunization Programme, nine out of 19 cities and provinces have to date finalized the first vaccination stage, including Tay Ninh, Long An, Ba Ria – Vung Tau, Khanh Hoa, Da Nang, Gia Lai, Hoa Binh, Ha Giang and Bac Ninh.