The Ministry of Health confirmed 4,147 domestic COVID-19 cases across Vietnam on Thursday, along with 719 recoveries and 81 fatalities.
The latest cases were recorded in 42 provinces and cities, the Ministry of Health said, adding that 1,718 patients were detected in the community.
The ministry also logged four imported infections on Thursday.
Soc Trang Province registered 1,059 of the locally-infected cases, Ho Chi Minh City 909, Dong Nai Province 647, Binh Duong Province 483, Tay Ninh Province 274, An Giang Province 104, Kien Giang Province 80, Khanh Hoa Province 35, Can Tho City 20, Ba Ria-Vung Tau Province 11, Hanoi one, and Da Nang one.
Vietnam had found 3,458 domestically-acquired infections on Wednesday.
The country has confirmed 849,197 community transmissions in 62 out of its 63 provinces and cities since the fourth virus wave emerged on April 27.
Ho Chi Minh City is struck the hardest with 414,744 patients, followed by Binh Duong Province with 223,959, Dong Nai Province with 57,122, Long An Province with 33,494, Tien Giang Province with 14,774, Dong Thap Province with 8,937, Khanh Hoa Province with 8,371, Da Nang with 4,932, Ba Ria-Vung Tau Province with 4,364, and Hanoi with 4,304.
Vietnam logged only 1,570 locally-transmitted infections in total in the previous three waves.
The health ministry announced 719 recoveries on Thursday, bringing the total to 788,005.
The toll has climbed to 20,950 deaths after the ministry documented 81 fatalities on the same day, including 61 in Ho Chi Minh City and 10 in Binh Duong Province.
Vietnam has reported 853,842 patients since the COVID-19 pandemic first hit it early last year.
Health workers have administered over 57.4 million vaccine doses, including 1,005,055 shots on Wednesday, since inoculation was rolled out on March 8.
More than 16.8 million people have been fully vaccinated.
Health authorities target to inoculate at least two-thirds of a population of nearly 98 million people against COVID-19 by the first quarter of next year.