WASHINGTON (CBS) — Sorry, kids. If you want to ward off the flu this year, you better get ready to roll up your sleeves and look away.

The flu mist nasal vaccine is often given to children to protect them from illness, but an advisory committee to the Centers For Disease Control says it should not be used for the upcoming flu season because it’s just not working.

“Two of the last three seasons it hasn’t worked at all,” says CDC Dr. Joseph Bresee about the nasal spray. “On the other hand, the flu shot has been effective.”

It’s not clear why the nasal spray doesn’t work – it was once thought to be more effective than the shot.