The three localities with the highest number of new cases confirmed on Monday were Hanoi with 189,326 cases, the northern Bac Giang Province with 4,186 cases, and the central Nghe An Province with 3,883 cases.
The new cases bring the infection tally in the fourth wave to over 9.19 million cases.
Of the day's tally, 55,010 cases were detected in the community.
The Covid-19 death toll in Vietnam rose to 42,361 with the confirmation of 52 deaths Monday.
The Health Ministry also confirmed 122,730 recoveries the same day, bringing the total number of recovered cases so far to 5,474,708.
Over 76.8 million people of Vietnam's 96 million population have been vaccinated with two doses, and more than 48.9 million have received the third dose.