The Indiana State Department of Health says flu season occurs annually, typically starting around October and continuing through May. Seasonal flu viruses can vary from year to year, so it is important to get a flu vaccine every year to protect against them.

It's estimated that only 44.7 percent of Hoosiers received a flu vaccine during the 2014-15 season and almost half of all Hoosier children ages 6 months to 17 years did not receive a flu vaccine. Officials add that the flu vaccine is the best protection against the flu and may be offered by many doctor’s offices, clinics, health departments, urgent care centers, pharmacies, college health centers and employers.