Florida on Thursday reported 21,765 more COVID-19 cases and 901 deaths to the Centers for Disease Control and Prevention, according to Miami Herald calculations of CDC data.

All but two of the newly reported deaths occurred after July 25, with a vast majority, about 78%, of those people dying in the past two weeks, according to Herald calculations of data published by the CDC. The majority of deaths happened during Florida’s latest surge in COVID-19 cases, fueled by the delta variant.

It is the largest single-day increase to the death total in the state’s COVID pandemic history.

The jump in the number of reported cases and deaths is due to the newest way deaths and cases are counted. The CDC implemented the change earlier this month, causing occasional one-day aberrations like the 901 additional deaths on Thursday and 726 more deaths reported Monday.