Flu-like illness accounts for 0.06% of emergency department visits in Shenandoah, Clarke, Frederick and 2 more counties for the week of September 20. Flu-like illness activity in Shenandoah, Clarke, Frederick and 2 more counties is holding steady compared with recent weeks. The highest reading in the current data window is 0.07%.

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