Flu season is just around the corner, and public health experts are urging Americans to get vaccinated.

The flu vaccine is recommended for everyone six months and older, and is widely available at pharmacies and doctors’ offices. Unfortunately, the nasal flu vaccine, which is popular among kids and was used by 20 million people last season, will not be available. Vaccine efficacy tests revealed earlier this year that the nasal flu vaccine is currently not effective, for reasons that aren’t yet clear. Still, experts are urging Americans to get vaccinated in shot form to avoid getting the flu, which can be severe for young people and the elderly.