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Flu season is in full force in the United States.
Public health experts say this is the worst flu season in over a decade.
The flu vaccine is updated annually based on the strains at the end of the prior season.

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If people are sick, they should stay home.
There are several things you could do to reduce your risk of getting severely ill from the flu.
If you do get the flu, having the vaccine can reduce the severity of symptoms, Chapnick said.
Knowing which virus you have can help you get the right medications.
These tests can detect both viruses.
you could call your pharmacy to find out if the pharmacists are allowed to test and treat the flu.
What This Means For You
The U.S. is having a severe flu season this year.