The three localities with the highest numbers of local cases in the day were Hanoi with 2,982, Da Nang with 888 and Khanh Hoa with 680 cases.
The Health Ministry also confirmed 129 Covid-19 deaths Sunday, taking the nation's Covid-19 death toll to 35,609, or around 1.8 percent of all infections.
Vietnam has recorded 68 cases infected with the Omicron variant so far, all imported. There are 30 in Ho Chi Minh City, 27 cases in Quang Nam, three in Da Nang, two each in Thanh Hoa and Khanh Hoa, and one each in Hanoi, Hai Duong, Hai Phong and Long An.
So far, 1,727,290 Covid patients in the country have recovered. Around 72.3 million people have received their second vaccine shots and 17 million have received their third.