3 Boulder County Cases Of Flu Require Hospitalization, Warning Sent Out

BOULDER, Colo. (CBS4) – A warning is out to people as flu season and holiday travel begin to get underway.
Authorities in Boulder say doctors have already hospitalized three people who came down with influenza.
They are reminding people to get flu shots to protect themselves.
The annual flu vaccine is drawn from the vile into the needle Feb. 7, 2015, at Crawford Kids Clinic in Aurora. (credit: Brent Lewis/The Denver Post via Getty Images)
People who are at higher risk for influenza include