Flu-like illness accounts for 0.3% of emergency department visits in Jefferson, Adams, Arapahoe and 8 more counties for the week of September 20. Flu-like illness activity in Jefferson, Adams, Arapahoe and 8 more counties is rising compared with recent weeks. The highest reading in the current data window is 0.3%.

Emergency department visits for influenza in your local area, from CDC surveillance data.