Ho Chi Minh City led with 7,122 new cases, followed by Binh Duong Province (2,194) and Dong Nai Province (871).
Of the day's tally, 8,099 cases were detected in the community with unclear sources of transmission while the remaining had been contained in quarantine and lockdown areas. This brings the total number of cases in the fourth Covid-19 wave starting late April to 532,491.
Total recoveries since the start of the pandemic rose to 301,457 with 9,730 of them announced on the day.
331 deaths were confirmed Monday, most of them in HCMC. The Covid-19 death tally is now at 13,385, or 2.5 percent of infections.
Vietnam has vaccinated 22.01 million people, among them 3.33 million have received two doses.