The AstraZeneca phase 1 included physicians, health workers and other personnel. All those immunized are in good health.
Vietnam received at the beginning of April more than 800,000 AstraZeneca doses to continue its domestic immunization campaign.
At the same time, Vietnam is today working on three of its own vaccine candidates, two of which are in clinical testing in humans.
The Ministry of Health reported on Thursday that 551 people were administered with the two Nano Covax doses, where stinging in the puncture area, low fever and slight muscle and joint pains were the only reactions.