The nation, the world's third-most infected, on Sunday reported 78,761 new cases in 24 hours, passing the number posted in the US on 17 July.
The rise comes as the government continues to lift restrictions to try to boost an economy that lost millions of jobs when the virus hit in March.
An upsurge of Covid-19 in many rural areas continues to be a major concern.
On Sunday, global infections passed the 25 million mark, with 843,000 deaths. The US remains the most affected nation, closing in on six million infections, according to Johns Hopkins University research.