Avian Influenza H5N1 (Bird Flu)

10 Épidémie Actives

Highly pathogenic avian influenza H5N1 has caused 71 confirmed human cases across 13 US states since 2024, with ongoing exposure through dairy farms and poultry operations. As of June 2026, cases have been confirmed in California, Colorado, Iowa, Louisiana, Michigan, Missouri, Nevada, Ohio, Oregon, Texas, Washington, Wisconsin, and Wyoming. Three cases involved unknown exposure sources. Two deaths have occurred. CDC considers current risk to the general public as low, but monitors closely for signs of person-to-person transmission.

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Pays Affectés
1,722
Cas Récents (30 j)
10
Épidémies Actives
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Qu'est-ce que Avian Influenza H5N1 (Bird Flu)?

H5N1 was first identified in humans in Hong Kong in 1997 during an outbreak linked to live poultry markets. Since 2003, it has caused numerous outbreaks in bird populations across Asia, Africa, and parts of Europe, leading to sporadic but often severe human infections and significant concerns for pandemic potential.

SymptĂ´mes

  • High fever (often >100.4°F or 38°C)
  • Cough
  • Sore throat
  • Muscle aches
  • Shortness of breath or difficulty breathing
  • Pneumonia
  • Less common: eye infections (conjunctivitis), diarrhea, vomiting

Transmission

Avian Influenza H5N1 primarily spreads to humans through direct, prolonged contact with infected poultry (live or dead), their secretions (saliva, feces), or contaminated environments (e.g., surfaces in live bird markets). Human-to-human transmission is rare and has not been sustained, but close contact with an infected person might pose a limited risk.

Période de Contagiosité : Varies by disease

Prévention

  • Avoid contact with sick or dead birds, poultry, and their droppings.
  • Do not visit live bird markets or farms in affected areas.
  • Practice meticulous hand hygiene with soap and water or alcohol-based sanitizer.
  • Cook poultry and eggs thoroughly to safe temperatures.
  • Avoid consuming raw or undercooked poultry products.
  • While a general H5N1 human vaccine is not publicly available, specific vaccines are in development for preparedness.

Live Avian Influenza H5N1 (Bird Flu) Global Case Map

1 country with reported activity. Updated from real-time surveillance data.

No reports
Low activity
High activity

Épidémies Actives et Cas Récents

Renseignements en temps réel issus de la surveillance sanitaire mondiale et de la surveillance par IA

Sources de données : BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé

✓ Données en direct mises à jour en temps réel depuis les sources de santé mondiales

Fears egg prices will soar as farmers scramble to protect flocks from bird flu

Australia 2026-08-07
Actif

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While there have so far been no reports of the deadly avian flu infecting any birds in Australian commercial poultry farms, the first mass mortality event was confirmed Down Under on Monday with the deaths of dozens of wild greater crested terns, found on an

đź”— Read more at Australian Broadcasting Corporation

Bird flu preparations ramp up as cases rise in Australia

Australia 2026-08-07
Actif

Poultry industry waiting and watching to see if protection measures can ease

A wildlife hospital has set up an off-site triage centre to assess wild birds for signs of the deadly H5 flu, in case the country sees widespread transmission of the disease.

There have been no new cases in the three weeks since the second infection was confirmed in a New Zealand bird on 17 July. However, case numbers are on the rise in Australia.

So the hospital, as well as New Zealand's poultry industry, are playing

đź“° 12 news sources reporting on this story.

đź”— Read more at Australian Broadcasting Corporation

Australia Urged to Vaccinate Wildlife Against H5N1 Flu

Australia 2026-08-06
Actif

Australia has confirmed deadly H5N1 bird flu has been found in 102 wild seabirds across five states at the time of writing, including the country's first mass death of birds. Author * Jane Younger Senior Lecturer in Southern Ocean Vertebrate Ecology, Institute for Marine and Antarctic Studies, University of Tasmania The question is no longer if this virus can harm Australian wildlife, but whether we should use every available tool to protect species most at risk . Vaccination cannot stop H5N1 spreading through wildlife. But it could prevent an outbreak from killing all of the at-risk species in an area - a tragic local extinction. Australia should begin targeted vaccination of threatened birds. It should also urgently develop a strategy for seals and sea lions, rather than waiting until th...
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Bird flu decimated South America's marine mammals. What can Australia do differently?

Australia 2026-08-05
Actif

Add Yahoo as a preferred source to see more of our stories on Google. Australia is now confronting an outbreak of a deadly bird flu strain. As of Monday, the highly pathogenic H5N1 virus had been detected in 78 wild birds across mainland Australia. Until now, there had been no evidence of a large-scale outbreak. But authorities have confirmed the first instance of mass death caused by H5N1 among dozens of greater crested terns off South Australia's south-east coast. They are also conducting further testing on a cluster of sick and dead terns in south-west Victoria. As H5N1 spreads across the country, researchers, wildlife managers and the broader public are increasingly concerned about the risks it may pose beyond birds. Recent outbreaks have threatened aquatic mammals, including southern ...
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Australia confirms first mass-mortality event from H5 bird flu in native seabirds

Australia 2026-08-03
Actif

SYDNEY - Australia warned on Aug 3 against the risk of a wider spread of H5N1 bird flu after its first mass mortality episode among seabirds killed about 50 greater crested terns off the coast south of Adelaide. However, there is no evidence yet of the virus on Australia's farms, many of which have locked down to safeguard poultry flocks since it was first detected in June. Agriculture Minister Julie Collins said testing confirmed H5N1 bird flu in a group of 49 dead and 35 sick terns found by helicopter surveillance on rocks off Cape Jaffa, 250km from Adelaide on July 31. "Australians should expect to see more spread and larger numbers now of wildlife being affected," she told reporters in Canberra, the capital. "This is the first confirmed case of a mass mortality," she added. "Once the H...
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Australia facing 'tsunami of devastation' over H5 bird flu outbreak

Australia 2026-08-02
Actif

South Australia may be facing Australia's first mass wildlife death event linked to H5N1 bird flu. More than 80 sick or dying greater crested terns have been found on an island off the South Australian coast. Nationally, the government says the virus can no longer be eradicated. While the risk to human health remains low, native species could be hit hard. Listen to Australian and world news and follow trending topics with SBS News Podcasts. TRANSCRIPT South Australia has reported what could be the first mass-mortality event in local wildlife as the H5N1 strain of bird flu establishes itself in native wildlife populations. "What is of a concerning new news that has come through is that we have 49 dead, and 35 sick greater crested terns that have been reported off of Cape Jaffa." State Envir...
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Australia confirms first mass death of seabirds from H5N1 bird flu

Australia 2026-08-03
Actif

CANBERRA, Aug 3 (Reuters) - Australia warned on Monday against the risk of a wider spread of H5N1 bird flu after its first mass mortality episode among seabirds killed about 50 greater crested terns off the coast south of Adelaide. However, there is no evidence yet of the virus on Australia's farms, many of which have locked down to safeguard poultry flocks since it was first detected in June. Agriculture Minister Julie Collins said testing confirmed H5N1 bird flu in a group of 49 dead and 35 sick terns found by helicopter surveillance on rocks off Cape Jaffa, 250 km (155 miles) from Adelaide on Friday. "Australians should expect to see more spread and larger numbers now of wildlife being affected," she told reporters in Canberra, the capital. "This is the first confirmed case of a mass mo...
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Australia Bird Flu Outbreak Grows as Infections Triple in a Week

Australia 2026-08-03
Actif

Australia is grappling with a rapid spread of avian flu among wild birds, with authorities warning that the virus has become increasingly difficult to control and poses a significant mortality threat to the nation's wildlife.

The number of confirmed or presumed positive cases of deadly H5 avian influenza in Australian birds has risen to 74, Agriculture Minister Julie Collins said on Monday. That's nearly three times the level reported by the government a little less than a week ago.

"Once the H

đź“° 51 news sources reporting on this story.

đź”— Read more at News.com.au

The warning signs are over: Australia now faces a devastating bird flu outbreak in wildlife

Australia 2026-08-02
Actif

Add Yahoo as a preferred source to see more of our stories on Google. The spread of H5N1 birdflu is worsening. At the time of writing, Australia has 53 confirmed detections in wild seabirds across five states. In South Australia there are 39 confirmed cases, including a silver gull at Robe and 19 greater crested terns found along the Limestone Coast and Seal Bay on Kangaroo Island. South Australian authorities are also investigating 49 dead and 35 sick greater crested terns found by aerial surveillance teams at an offshore location south of Cape Jaffa. Samples are still being tested, but if confirmed, this would represent the first mass mortality of Australian animals associated with the virus. Until recently, Australia's detections were mostly isolated migratory seabirds arriving from the...
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Australia Warns of More Mass Bird Deaths as H5 Bird Flu Spreads

Australia 2026-08-04
Actif

TEMPO.CO, Jakarta - Australian authorities have warned that more mass bird deaths are likely after the country confirmed its first large-scale wildlife mortality event caused by the highly pathogenic H5 avian influenza virus, commonly known as bird flu, marking what officials described as the beginning of a prolonged environmental crisis. The outbreak was confirmed after dozens of greater crested terns and silver gulls died at Baudin Rocks, off Cape Jaffa in South Australia, becoming Australia's first recorded mass mortality event linked to the H5 strain of bird flu. Agriculture Minister Julie Collins said the virus could continue affecting Australia's wildlife for years despite extensive preparedness efforts. "This could be a long period of time and a very long journey," Collins said, not...
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Ressources Expertes et Références

Informations fiables provenant des principales organisations de santé

CDC

Directives officielles des Centers for Disease Control and Prevention des États-Unis

Voir les Ressources du CDC →

WHO

Surveillance mondiale des maladies et directives de l'Organisation Mondiale de la Santé

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Recherche

Dernières recherches évaluées par les pairs et études cliniques

Voir la Recherche →

Contenu Révisé Médicalement

Les informations sur les maladies sur Virus Watcher sont révisées par notre Épidémiologiste en Chef, ancien analyste principal du CDC pour les prévisions FluSight. Les données épidémiques sont agrégées à partir de sources vérifiées notamment BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé. Ces informations sont à des fins éducatives et ne doivent pas remplacer les conseils médicaux professionnels.

Dernière révision : 2026-08-08

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