The patient in the capital lives in Hai Ba Trung District and had been in close contact with the Van Don International Airport security worker who tested positive earlier this week.
The Ministry of Health said the other new cases are one from Hai Phong City, one from Bac Ninh Province, two from Quang Ninh Province, and four from Hai Duong Province.
Patient 1561 from Hai Phong and Patient 1565 from Hai Duong both live in Hai Duong and are connected to the virus hotspot in Chi Linh City, Hai Duong Province.
Patients 1573 and 1574 are from Quang Ninh had also been in close contact with the airport guard.
All the new cases are currently being treated and health officials are continuing to track and trace anyone who may have come into contact with the new patients.
After almost two months without any locally transmitted cases, a new surge of positive patients emerged in northern Vietnam on Thursday.
Chi Linh City, home to more than 200,000 people, has been locked down and flights in and out of Van Don Airport suspended.
At present, there are currently more than 21,000 people isolated at medical facilities, hotels and their homes.