Agriculture Daily Summary
Agriculture Daily Summary: What Happened on October 28, 2026
mRNA vaccine reduced H5N1 levels in milk in an eight-cow study
Researchers also found less disease after viral challenge, but tested the vaccine in only four cows.
Today in brief
After H5N1 challenge, vaccinated cows had about 1,000-fold lower peak viral RNA levels in milk than controls.1 The study included four vaccinated cows and four saline-treated controls.1
Also worth knowing
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Vaccinated cows also had less mastitis and mammary fibrosis after H5N1 challenge, and researchers reported no obvious adverse effects.1