Flu vaccinations are available for St. Clair County residents on a walk-in basis every Monday from 10 am until 6 pm and Wednesday 8 am until 4 pm at the main office located at 3415 28^th Street in Port Huron.  Tuesdays, Thursdays and Fridays by appointment.  Flu shots are $25 but may be less dependent upon income.   Flu mist (nasal spray) is $20.  Some insurances are accepted.  The Teen Health Center also offers flu vaccine by appointment for those 10-21 years of age and is located at 2215 Court Street in Port Huron.  A flu vaccination is necessary every season, as immunity can wane. The single best way to protect against the flu is to get vaccinated each year and it is recommended that everyone 6 months of age and older get immunized.   For more information, contact the Preventive Health & Immunizations Division at 810-987-5729 or the Teen Health Center at 810-987-1311. For flu updates visit our website www.stclaircounty.org/offices/health or call the Flu Hotline (810)966-4161.