KUSA - Medical experts with the Colorado Adult Immunization Coalition are at 9NEWS Monday morning to answer questions about the flu - its symptoms and treatment.
Flu Line9 was open until 8 a.m. on Monday.
More than 700 people have been treated for the flu in Colorado hospitals.
It's the worst flu season since 2009, according to the Colorado Department of Health.
They say, young adults and children are being hit the hardest by flu this year.
It's not too late to get a flu shot. The full benefits of the vaccine take up to two weeks to be effective.
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