◂ Event Timeline

Nov 11, 2026DISEASEUS

USDA confirms Oregon's first case of HPAI in a dairy herd

USDA's APHIS confirmed highly pathogenic avian influenza H5 in a dairy cattle herd in Oregon, the first case in that state. Oregon is the 22nd state infected since March 2024, and enhanced biosecurity is recommended for dairy farms.

WHY IT MATTERS

A single confirmed herd is a limited supply event with no evident price impact on dairy or feed markets beyond routine disease concern.

AFFECTSMilk (Class III)◆

SOURCE
feedstrategy.comPress releaseNov 11, 2026

Price reaction & history

Milk (Class III)◆neutral

After 22 past neutral disease events, Milk (Class III) moved a median -0.1% over 5 sessions (41% higher; middle half -1.4% to +0.5%), and +0.2% over 20.

Mar 20, 2026Why We Must Vaccinate US Dairy Cattle Against HPAI H5N1 | The Journal of Infectious Diseases | Oxford Academic+0.1%
Jul 23, 2025Current Situation: Bird Flu in Dairy Cows | Bird Flu | CDC-0.6%
Dec 19, 2025Update: Genetic Sequencing Results for Wisconsin Dairy Herd Detection of Highly Pathogenic Avian Influenza | APHIS+0.4%
Oct 31, 2024HPAI in California is a mixed bag for markets-1.6%
May 5, 2026Dairy farms in California may transmit H5N1 virus through multiple sources+0.4%

Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.

Milk (Class III) MILK · GP ▸

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