Articles on Avian flu H5N1

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Avian influenza (‘bird flu’) is a highly transmissible and usually mild disease that affects wild birds such as geese, swans, seagulls, shorebirds, and also domestic birds such as chickens and turkeys. (CDC and NIAID)

Bird flu FAQ: What is avian influenza? How is it transmitted to humans? What are the symptoms? Are there effective treatments and vaccines? Will H5N1 become the next viral pandemic?

Avian influenza — commonly known as ‘bird flu’ — is infecting domestic and wild birds in Canada and around the world.
Bird flu is transmitted mainly by wild birds, like these snow geese in Ruthsberg, Md., in January 2023. Photo by JIM WATSON/AFP via Getty Images

As bird flu continues to spread in the US and worldwide, what’s the risk that it could start a human pandemic? 4 questions answered

Avian influenza viruses have evolved to infect birds, but the current H5N1 outbreak is also infecting a wide range of mammals. This suggests that it could mutate into forms that threaten humans.
Wild birds like pelicans and ducks are getting infected with – and dying from – a new strain of avian influenza and have spread it to farm animals around the world. Klebher Vasquez/Anadolu Agency via Getty Images

What is spillover? Bird flu outbreak underscores need for early detection to prevent the next big pandemic

A biologist who studies how viruses spread from animals to people explains the process of spillover and the risks posed by the new bird flu that has spread across the globe.
Healthy turkeys on a farm in West Newfield, Maine. Shawn Patrick Ouellette/Portland Press Herald via Getty Images

Bird flu has made a comeback, driving up prices for holiday turkeys

Hunters are warned to take precautions handling wild birds, and the virus can spill over to non-avian species, so no one should approach wild animals that appear ill.
The strain of H5N1 bird flu identified in Canada, the United States and Europe can cause severe disease and high mortality in domestic poultry. (AP Photo/Robert F. Bukaty)

Avian influenza: How bird flu affects domestic and wild flocks, and why a One Health approach matters

Avian influenza virus — or bird flu — can infect domestic poultry such as chickens and turkeys, as well as wild birds. The H5N1 strain has been identified in Canada.
Epidemiologists in protective suits collecting a dead bird from the sea beach in the course of the spreading of the bird flu, Germany. blickwinkel / Alamy Stock Photo

Bird flu outbreaks in Europe: what you need to know

Each year in spring and summer, waterbirds mingle on their breeding grounds in Siberia and mix their flu viruses, creating new variants they then bring to Europe, Asia and Africa.
A security guard leads reporters away from the Wuhan Institute of Virology after a WHO team arrived for a field visit in Wuhan, Hubei province of China, Feb. 3, 2021. The team came to no conclusions about the origins of the pandemic. (AP Photo/Ng Han Guan)

Origins of SARS‑CoV‑2: Why the lab‑leak idea is being considered again

Gain-of-function studies make a natural virus more dangerous or transmissible to humans. Could the Wuhan Institute of Virology be the source of SARS-CoV-2?
Bejing. Bird flu is transmitted in various ways and the process needs to be studied in depth. Sojourner in a Strange Land/Flicker

Bird flu: are viruses still in the air?

A scientific question fascinates experts : under which conditions can bird flu virus be transmitted to humans by aerial particles, and what will be the consequences for those who aren’t immune?
A Ugandan chicken farmer rides to market in this file photo. In the wake of an outbreak of avian flu farmers have been told to quarantine their poultry. EPA/Kim Ludbrook

Bird flu outbreak in Uganda: some key facts about the virus

Since regular monitoring for avian influenza viruses started, several subtypes that have been circulating - but not all pose a threat to humans.
As part of pandemic preparation, in the early 2000s many countries amassed large stockpiles of the influenza neuraminidase inhibitor Tamiflu. Tony Hisgett/Flickr

Controversies in medicine: the rise and fall of the challenge to Tamiflu

One of the biggest recent controversies in medicine involves the effectiveness of the antiviral drug Tamiflu. Governments have stockpiled the drug but many have raised doubts about its usefulness.

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