Single-week totals for flu cases are hitting record highs.

For the week of Feb. 11-18, the Division of Public Health is reporting 1,521 laboratory-confirmed influenza cases. The total number of flu cases for the season is at 5,758, an all-time high since record-keeping began with the 2004-05 season. These numbers only reflect laboratory-confirmed flu cases and the actual number of flu cases in the community is likely higher.

In addition to the 1,521 new lab-confirmed cases, DPH also announced that there have been five more flu-related deaths since Feb. 19. The individuals ranged from 62 to 86 years old and all had underlying health conditions. Three were from New Castle County, one was from Kent County, and one was from Sussex County.

These five deaths bring the season total to 23. The most deaths reported in a single season was 28 in 2014-15.