World Brazil COVID deaths exceed 4,000 in a day as mass graves, low oxygen supplies shake the nation April 7, 2021 Anne Godlasky, USA TODAY Comments Off on Brazil COVID deaths exceed 4,000 in a day as mass graves, low oxygen supplies shake the nation Brazil reported a 24-hour tally of coronavirus deaths exceeding 4,000 for the first time. Only the U.S. and Peru have hit that threshold.