Hanoi continued to lead the tally with 843 cases, followed by Phu Tho (386) and Gia Lai (341).
In the past 24 hours, one Covid-19 patient has died, bringing the death tally in the past seven days to six, down 46 percent from the previous seven-day period.
Since the pandemic started last year, the death toll in Vietnam has climbed to 43,038, or 0.4 percent of all infections.
In the latest wave that hit the country in late April, more than 10.5 million cases have been confirmed and 9.2 million of them have recovered.
80.4 percent of the population have been fully vaccinated, while 57.7 percent have received their third Covid-19 vaccine shots.