Up-to-the-minute flu information at your fingertips, from activity maps to podcasts. Flu activity levels by state across the entire USA. A detailed list of flu activity by state, sortable by activity level and alpa. Let your Facebook and Twitter contacts know the latest about flu. The latest flu reports direct from the CDC, often on a daily basis. The current flu activity level for each state and a graphed history. Regular podcasts on flu-related issues.