Flu season is picking up steam, and it could get even worse as people return to Middle Tennessee from vacation. The Centers for Disease Control and Prevention says 29 states are now reporting high levels of symptoms associated with the flu, including Tennessee. The flu is most heavily concentrated in the southeast, and health officials say it could spread even more now that kids are returning to school after winter break. While several Middle Tennessee and southern Kentucky local schools took some days off because of illness before the holidays, those that were back in session Friday aren’t seeing issues yet. The health department said many of its clinics still have the flu vaccine available free of charge. If you want to get a vaccine, first call your local health department to find out if it’s still available. If it is not, you can always go to a health department in a different county.