Oregon Sees Surge in Influenza B Cases

State lands in CDC's highest risk tier as new flu strain spreads

Published on Feb. 11, 2026

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Oregon has been placed in the Centers for Disease Control and Prevention's (CDC) highest tier for flu activity as the state sees a rise in cases of influenza B, a strain that typically emerges later in the season and can be more severe, especially for children and the elderly.

Why it matters

The spread of influenza B in Oregon is concerning as it can lead to more hospitalizations and deaths, especially among vulnerable populations. This comes as the state was already dealing with a decline in influenza A cases, highlighting the unpredictable nature of flu season.

The details

Influenza B typically emerges later in the flu season and can be more severe than influenza A. Oregon health officials say the state has seen a rapid increase in influenza B cases in recent weeks, leading to the CDC placing it in the highest risk tier for flu activity.

  • Oregon has seen a rise in influenza B cases in recent weeks.

The players

Centers for Disease Control and Prevention (CDC)

The leading national public health institute in the United States.

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What’s next

Health officials are urging Oregonians to get their flu shots, as the influenza B strain can be particularly dangerous for children and the elderly.

The takeaway

The emergence of influenza B in Oregon highlights the unpredictable nature of flu season and the importance of staying vigilant with preventative measures like vaccination, especially for vulnerable populations.