Brazil and Argentina registered daily records for confirmed coronavirus cases on Wednesday, pushing the total number of cases in Latin America past 4 million and underlining the difficulty the region faces in controlling the pandemic.

Brazil registered 67,860 additional cases of the virus on Wednesday, along with 1,284 related deaths. That brought the total number of cases in Latin America’s largest nation to 2,227,514, while deaths rose to 82,771.

Neighboring Argentina posted a daily record of 5,782 confirmed cases, the vast majority of them in and around the capital, Buenos Aires, taking the total number infected in the country to 141,900.