The latest domestic case is a 25-year-old woman in the central city of Da Nang who had close contact with patient 2982, who tested positive for the new coronavirus on Monday.
The imported cases were detected in Hanoi, Hung Yen, HCM city, Da Nang, Ha Tinh, and Khanh Hoa.
More than 2,500 out of nearly 3,000 COVID-19 patients in Vietnam have recovered and 35 have died.