By Kenny Choi

SAN FRANCISCO (KPIX 5) — Many kids around the U.S. will have to feel the sting of the flu shot this fall after a U.S. Centers For Disease Control and Prevention advisory committee voted that the nasal spray vaccine mist should not be used in the upcoming season.

“Two of the last three seasons it hasn’t worked at all. At least in our hands. We haven’t seen any of our data that indicates the vaccine has been effective. On the other hand the flu shot has been effective in usually 50 to 60 percent of the time,” Dr. Joseph Bresee with the CDC said.

It’s estimated that about a third of children get the nasal spray vaccine each year. Earlier data found the nasal spray was actually more protective than shots for children. Health officials don’t known why spray isn’t as effective now.

Many hospitals and doctors have already placed their orders for flu vaccine. Experts say getting additional doses may be a challenge this fall.

“I think it may be a doctors have to call one or two places to make sure they get the vaccine they need but I think overall there won’t be any shortages,” Dr. Breese said.

The makers of the nasal spray say the CDC’s effectiveness data contrasts with studies done by Astra Zeneca, as well as other findings.

The company says it is working with the CDC.