The new infections brought confirmed coronavirus cases to 45,032 and 4,767 deaths in total, according to the official tally.
Mexico's previous highest daily confirmed cases total was a day earlier on May 14, when authorities reported 2,409 new infections. Mexico's highest daily death toll was on May 12, when health authorities reported 353 fatalities.
* Brazil confirmed 15,305 new cases of the novel coronavirus on May 15, a record for a 24-hour period, as well as 824 related deaths, according to data from the Health Ministry.
Brazil has registered 218,223 confirmed coronavirus cases since the start of the pandemic and 14,817 deaths.