H5N1

Influenza A (H5N1) virus – also called “H5N1 virus” – is an influenza A virus subtype that occurs mainly in birds, is highly contagious among birds, and can be deadly to them. H5N1 virus does not usually infect people, but infections with these viruses have occurred in humans.
What is Bird Flu (H5N1)?

Bird flu or avian flu is a highly contagious viral infection that is transmitted between birds and on rare occasions, from birds to humans.

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Overview

Feature Articles

Latest H5N1 News and Research

Registration Now Open for World Vaccine Congress Washington 2025: Leading Experts from Government, WHO, CEPI, and more to Speak

Registration Now Open for World Vaccine Congress Washington 2025: Leading Experts from Government, WHO, CEPI, and more to Speak

Current antivirals not successful in treating severe H5N1 bird flu infections

Current antivirals not successful in treating severe H5N1 bird flu infections

U.S. consumers still unaware of raw milk risks despite bird flu findings

U.S. consumers still unaware of raw milk risks despite bird flu findings

Older adults may have stronger immunity to bird flu, Penn study finds

Older adults may have stronger immunity to bird flu, Penn study finds

Many parents uncertain about bird flu information and risks, poll suggests

Many parents uncertain about bird flu information and risks, poll suggests

New sensor offers rapid detection of airborne bird flu virus

New sensor offers rapid detection of airborne bird flu virus

Smartwatches could be a powerful tool to prevent future pandemics

Smartwatches could be a powerful tool to prevent future pandemics

Air sampling detects 70–90% of poultry viruses and reveals 50 more hidden threats

Air sampling detects 70–90% of poultry viruses and reveals 50 more hidden threats

Study finds strong evidence that bird flu spreads through the air between farms

Study finds strong evidence that bird flu spreads through the air between farms

Fungal component may protect against flu-related lung damage

Fungal component may protect against flu-related lung damage

Single dose of antibody shields macaques from severe H5N1 influenza

Single dose of antibody shields macaques from severe H5N1 influenza

House cats with bird flu could pose a risk to public health

House cats with bird flu could pose a risk to public health

On the front lines against bird flu, egg farmers say they’re losing the battle

On the front lines against bird flu, egg farmers say they’re losing the battle

Pasteurization destroys influenza viruses in milk, reinforcing dairy safety

Pasteurization destroys influenza viruses in milk, reinforcing dairy safety

Antibody therapy provides protection against severe H5N1 avian flu in monkeys

Antibody therapy provides protection against severe H5N1 avian flu in monkeys

Trump administration’s halt of CDC’s weekly scientific report stalls bird flu studies

Trump administration’s halt of CDC’s weekly scientific report stalls bird flu studies

Led by RFK Jr., conservatives embrace raw milk. Regulators say it's dangerous.

Led by RFK Jr., conservatives embrace raw milk. Regulators say it's dangerous.

What losing WHO membership means for the U.S.

What losing WHO membership means for the U.S.

SHEA calls for continued U.S. partnership with the World Health Organization

SHEA calls for continued U.S. partnership with the World Health Organization

Study reveals dangerous mutations in H5N1 bird flu

Study reveals dangerous mutations in H5N1 bird flu

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