Flu season has officially begun, and the flu vaccine is now available. The flu can be a serious disease for children of all ages, causing them to miss school, activities, or even be hospitalized. The CDC and St. Louis County Department of Public Health recommend flu vaccinations for everyone 6 months and older. Preventing the spread of the flu can save lives. Encouraging staff and students to be vaccinated can play a vital role in stopping the transmission of this potentially fatal infection. Please keep in mind that it takes 2-3 weeks for the vaccine to become effective, so early vaccination is advisable.