Colorado is in the midst of what could end up as the state’s worst flu season in at least 20 years. “For right now, it looks like we are essentially tied as far as our worst season on record since we began doing influenza hospitalization surveillance,” back in 2004, said Dr. Rachel Herlihy, the state epidemiologist.

Oregon is seeing the worst flu activity since the Oregon Health Authority began tracking the virus 15 years ago, leading state health officials to encourage Oregonians to get their flu shots.

People continue to be hospitalized with the flu, at a time of the year when Oregon flu activity traditionally begins to wind down," the Oregon Health Department said in an email this week. The 2024-2025 flu season has been the worst since the agency began tracking the seasonal virus 15 years ago,

The Oregon Health Authority said it is seeing its worst flu season since the agency began tracking the virus 15 years ago.