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.

Bird Flu (H5N1) Genetics

Bird Flu (H5N1) Prevention

Bird Flu (H5N1) Treatment

Bird Flu (H5N1) Epidemiology

Bird Flu (H5N1) Symptoms

Latest H5N1 News and Research

H5N1's evolutionary leap could undermine vaccines and heighten human infection risk

From egg prices to pet food recalls – and now, confirmation that another strain of bird flu has infected a large commercial flock of broiler chickens on a Mississippi farm – headlines are capturing escalating concern over H5N1's spread.

24 Apr 2025

New biosensor offers fast detection of H5N1 in farm air

As highly pathogenic H5N1 avian influenza continues to spread in the U.S., posing serious threats to dairy and poultry farms, both farmers and public health experts need better ways to monitor for infections, in real time, to mitigate and respond to outbreaks.

24 Apr 2025

Public ignorance and apathy towards bird flu could hinder preventive efforts

In an editorial in the American Journal of Public Health, a team led by researchers from the CUNY Graduate School of Public Health and Health Policy (CUNY SPH) say public ignorance and apathy towards bird flu (highly pathogenic avian influenza, or HPAI) could pose a serious obstacle to containing the virus and preventing a larger-scale public health crisis.

17 Apr 2025

Vaccine trial shows promise for saving California condors from bird flu

Researchers evaluated the safety and immune response of a poultry-derived H5N1 avian influenza vaccine in black vultures and critically endangered California condors. The findings support the use of vaccination as a conservation tool against deadly avian flu outbreaks.

17 Apr 2025

Experimental bird flu vaccine offers strong protection in preclinical trials

A vaccine under development at the University at Buffalo has demonstrated complete protection in mice against a deadly variant of the virus that causes bird flu.

17 Apr 2025

Breakthrough in chicken genomics offers hope against avian influenza

An international team of researchers led by Professor Huaijun Zhou from the UC Davis Department of Animal Science has created the first-ever detailed map of how genes are regulated in chickens - a breakthrough that could help scientists breed birds that are more resistant to diseases like avian influenza.

10 Apr 2025

Trump’s immigration tactics obstruct efforts to avert bird flu pandemic, researchers say

Aggressive deportation tactics have terrorized farmworkers at the center of the nation's bird flu strategy, public health workers say.

10 Apr 2025

New approach to combat influenza and herpes with bean-based gum

In today's interconnected world, infectious diseases pose an escalating threat, as demonstrated by the coronavirus pandemic and outbreaks of H1N1, SARS, Ebola, Zika, and H5N1 (bird flu) viruses-all of which have had significant global health and economic impacts.

4 Apr 2025

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

Register for the World Vaccine Congress 2025, the premier event for vaccine experts and leaders, driving innovations in public health and pandemic preparedness.

From World Vaccine Congress Washington 21 Mar 2025

Current antivirals not successful in treating severe H5N1 bird flu infections

As the H5N1 avian influenza outbreak continues, scientists are working to better understand the virus's threat to human health.

17 Mar 2025

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

Although the Food and Drug Administration (FDA) located H5N1 bird flu virus in samples of raw, or unpasteurized, milk in tests in four states in April 2024, and bird flu has been detected in commercially sold raw milk, many Americans do not know that consuming raw milk and its products poses greater health risks than consuming pasteurized milk and its products, especially for children.

14 Mar 2025

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

Prior exposures to specific types of seasonal influenza viruses promote cross-reactive immunity against the H5N1 avian influenza virus, according to new research from the Perelman School of Medicine at the University of Pennsylvania.

13 Mar 2025

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

With soaring egg prices and ongoing bird flu headlines, many parents are uncertain about the risks and facts surrounding the virus, a national poll suggests.

10 Mar 2025

New sensor offers rapid detection of airborne bird flu virus

Recent outbreaks of highly pathogenic avian influenza (also known as bird flu) have created a need for rapid and sensitive detection methods to mitigate its spread.

7 Mar 2025

Smartwatches could be a powerful tool to prevent future pandemics

Everyday smartwatches are extremely accurate in detecting viral infection long before symptoms appear - now, research shows how they could help stop a pandemic before it even begins.

4 Mar 2025

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

Researchers found that environmental sampling in live-bird markets detects 70–90% of poultry viruses, often outperforming traditional swab methods, and identified 50 additional viruses, some from non-avian sources.

26 Feb 2025

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

Researchers provided genetic and meteorological evidence suggesting that windborne transmission of HPAI H5N1 over 8 km is possible, highlighting its role in poultry farm outbreaks.

24 Feb 2025

Fungal component may protect against flu-related lung damage

A component found in all fungi may provide a shield against flu-related lung damage, according to a new study.

18 Feb 2025

Single dose of antibody shields macaques from severe H5N1 influenza

National Institutes of Health (NIH) scientists and their colleagues report that a single dose of a broadly neutralizing antibody (bnAb) administered prior to virus exposure protects macaques from severe H5N1 avian influenza.

11 Feb 2025

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

More than 80 domestic cats, among many other types of mammals, have been confirmed to have had bird flu since 2022 — generally barn cats that lived on dairy farms, as well as feral cats and pets that spend time outdoors and likely caught it by hunting diseased rodents or wild birds.

10 Feb 2025