Flu Season 2024 End Date. Surveillance for each respiratory virus season starts on week 35 of a calendar year and ends on week 34 of the following calendar year. But when it comes to flu season, the cdc says flu cases typically start to rise in october and peak between december and february.

Routine annual influenza vaccination is recommended for all patients 6 months of age and older who have no contraindications. But when it comes to flu season, the cdc says flu cases typically start to rise in october and peak between december and february.