Flu reaches epidemic levels in the US

The Centers for Disease Control says the flu virus has already reached epidemic levels in the US, raising concerns.

The flu has taken the lives of at least 15 children and there is high flu activity in 22 states.

"It starts in the Southeast, the Midwest and then it spreads out from there. We've just had the holiday vacation, people spread the flu as they travel around," said Dr. Richard Besser, ABC News Chief Health and Medical Center editor.

With the flu vaccine less effective against this year's strain, flu related hospitalizations are up.

In Milwaukee there have been more than 220 hospitalizations, more than double the number at this time last year.

"I'm sick right now, so I've got the flu I think," said Erin Sims from Milwaukee.

Beyond calling your doctor, there's a growing practice called "telemedicine" where patients get on their computer or tablet, log in to a virtual waiting room and connect with a physician.

Health officials say people in the highest risk groups for severe flu include those older than 65, children under 5, pregnant women and people with medical conditions.

Beyond flu shots, Dr. Besser advises not to wait too long to begin your treatment, since anti-flu medications only work if started in the first two days.