More than 50 ambulances and buses were mobilised for the evacuation during the night.
The patients were transferred to Thanh Nhan, Duc Giang, and Hanoi Medical University hospitals.
The patients were carefully provided with protective clothing for Covid-19 prevention.
Serious patients were transported on ambulances.
More than 400 patients were transferred to Thanh Nhan Hospital.
As of Tuesday morning, the Covid-19 cluster at the Vietnam Germany Hospital has reported 42 infections including 33 in Hanoi, four in Nam Dinh, two in Ha Tinh, and one each in Hung Yen, Hai Duong, and Nghe An provinces.
Transport Police were sent to the hospital to assist in transportation.
The Hanoi Health Department has also started to send about 1,000 people to quarantine areas for Covid-19 prevention after they had close contact with the newly-found patients at the hospital.