The flu season is upon us, and doctors think it's already off to a bad start. More than double the number of cases are being reported compared to this time last year. Some experts say this year's flu shot might not prevent the illness for nine out of 10 people.

"I am afraid of needles, and she's afraid of needles, but we get it every year," said Manuel who brought his daughter Sophia to get a flu shot.

She said she wasn't feeling very well and came to the new Children's Hospital of San Antonio Primary Care Unit to see Dr. Sky Izaddoost.

"Last year, we didn't see anything until almost January and February. This year, it started as early as September," Izaddoost said.

She said getting that yearly flu shot is your best weapon.

"Every year, we are expecting it to change just a little bit because our immune system doesn't know what it's fighting. The virus is able to survive in you longer," she said.

According to the Centers for Disease control, the flu vaccine is typically 60 percent effective. In the 2014-2015 flu season, the shot only worked 19 percent of the time. In last year's season, it was 42 percent effective. This year, some experts claim the flu shot may only be 10 percent effective.

However, Dr. Izaddoost said this is "fake news."

"The CDC has not come out with numbers for this year yet," she said.

That 10 percent number actually reflects how effective the flu shot was in Australia's flu season a few months ago, during our summer. In the U.S., we base our vaccine largely on what happens there.

"I had one family that came in where one of the kids had a flu shot and the other had none. They both had 103 degree fevers. One of them was doing pirouettes around my room. The other one was laying on the table shaking," Izaddoost said.

In addition to getting the vaccine, the CDC recommends avoiding close contact with sick people, washing your hands often with soap and water and covering your mouth and nose when you cough or sneeze.

Also, it is recommended to sneeze into your arm and not your hand.

"Even if somebody is coughing and it looks like they are coughing a few feet away from you it is still possible you can catch it from there," Izaddoost said.

Ultimately, doctors recommend that you get that shot, get smart and avoid the bug.