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Just Ten Viral Particles Can Infect Cows with Bird Flu

Researchers found the virus can establish infection with 10 particles and produce high levels in milk, complicating efforts to stop farm spread.

Summary by News Medical
Just 10 viral particles of the H5N1 bird flu that caused hundreds of influenza outbreaks in U.S. dairy cattle can cause infection in cows, a new study shows.

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Just ten viral particles can infect cows with bird flu

Just 10 viral particles of the H5N1 bird flu that caused hundreds of influenza outbreaks in U.S. dairy cattle can cause infection in cows, a new study shows.

·United States
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pnas.orgpnas.org

Bird flu made the leap to cows in 2024. A recent study finds that just 10 viral particles of H5N1 are sufficient to cause infection, hinting how the virus infects and spreads so quickly.

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feedstuffs.comfeedstuffs.com

H5N1 infection in cows caused by only 10 viral particles

Study challenges theories about how avian influenza spreads on dairy farms.

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NewswiseNewswise

Only 10 Viral Particles Cause H5N1 Avian Flu Infection in Cows

Just 10 viral particles of the H5N1 bird flu that caused hundreds of influenza outbreaks in U.S. dairy cattle can cause infection in cows, a new study shows.

·Charlottesville, United States
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Newswise broke the news in Charlottesville, United States on Monday, June 15, 2026.
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