The UN health agency welcomed the fact that a "considerable number" of vaccine candidates had entered final stage Phase III trials, which typically involve tens of thousands of people.
The ministry now expects the central government primary deficit excluding interest payments to reach 866.4 billion reais ($167 bln) or 12.1% of gross domestic product this year.
The wider public sector deficit was also revised wider to 891.1 billion reais or 12.4% of GDP, from 812.2 billion reais or 11.3% of GDP.
Adjusted for seasonal factors, consumer confidence was 34.6 in August, the first time the gauge has been published in months.
Mexican gross domestic product shrank by more than 17% quarter-on-quarter in the April-June period as the pandemic battered Latin America's no. 2 economy,