Ho Chi Minh City led with 3,731 cases, followed by Binh Duong Province (2,513) and Dong Nai Province (443).
The changes compared to Tuesday are up 172 cases in HCMC, down 819 in Binh Duong and up 145 in Dong Nai.
The country has recorded 297,921 cases since the end of April, among them 36.4 percent have been discharged.
298 deaths were recorded Wednesday, bring the total since last year to 6,770, or 2.2 percent of total number of cases.
Vietnam has vaccinated 15.5 million people, among them nearly 1.5 million have received two doses.
The Ministry of Health on Wednesday started distributing an additional 30,000 bottles of Covid-19 treatment Remdesivir to southern localities. On August 8, it distributed the first batch 10,000 bottles.