Ahead of an unpredictable flu season, public health experts urge nation to sign up for flu shot

Last year's flu season saw the lowest rates of positive tests since the CDC started recording this data in 2005.

The flu season is notorious for being difficult to predict. However, flu trends from last year and from other parts of the globe can help us make informed estimates.

So far, experts are on the fence if this year's flu season may be mild like last year's, or if it may take a turn for the worse. But experts do agree on one thing; we can do our part by getting vaccinated.

And according to newly released U.S. Centers for Disease Control and Prevention data, about 52% of the U.S. population got a flu vaccination last flu season, which was similar to the prior season. The CDC and other public health agencies are trying to get even more people vaccinated this year because experts are worried about a worse flu season this year because population immunity is low due to a mild flu season last year.

"We are preparing for the return of the flu this season. The low level of flu activity last season could set us up for a severe season this year," said CDC Director Dr. Rochelle Walensky, speaking during a press event hosted by the National Foundation for Infectious Diseases.