MESA COUNTY, Colo. — The flu is at an all-time high in the United States, with the Centers for Disease Control reporting 6.4 million cases across the nation.

But here in Mesa County, numbers are low compared to other parts of Colorado.

Officials with the CDC say flu activity is widespread in 45 states– including Colorado.

Influenza A and B are the most predominant strains in the state.

Mesa County Public Health released this graphic indicating low numbers of flu-related illnesses and hospitalizations.

An epidemiologist explains the difference between flu cases in Denver compared to cases in Mesa County.

We are following what we’re considering normal flu track, where we’re seeing influenza Type A circulating mainly in our community right now. Whereas in Denver, and in the nation, we’re seeing Type B circulating more predominatley. And that’s unusual. We don’t usually see Type B flu untill spring.

ANDY TYLER, MESA COUNTY PUBLIC HEALTH

Andy Tyler also says type-B flu may cause a less severe reaction than type a flu virus.

The flu shot protects against both A and B strains.