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As bird flu spreads to mammals, WHO urges vigilance but no alarm

  • The UN health body says the risk to humans is low ‘for the moment’, though the spillover to animals like foxes, sea lions and bears needs to be watched closely
  • Tens of millions of birds have been culled worldwide amid severe outbreaks in Europe, North and South America

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Scientists at the Paracas National Reserve inspect a dead sea lion in January while deploying a monitoring and surveillance protocol for cases of birds and sea lions affected by avian influenza in the Ica region, Peru. Photo: Peruvian National Wildlife Areas Service via AFP

The World Health Organization called for vigilance after the recent detection of bird flu in mammals, but tried to calm fears that large-scale human outbreaks could be looming.

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“The recent spillover to mammals needs to be monitored closely,” the UN health agency’s chief Tedros Adhanom Ghebreyesus told reporters on Wednesday, stressing that “for the moment, WHO assesses the risk to humans as low”.

Since late 2021, Europe has been gripped by its worst-ever outbreak of bird flu, with North and South America also experiencing severe outbreaks.

This has led to the culling of tens of millions of domestic poultry worldwide, many with the H5N1 strain of the virus. The global outbreak is also responsible for the deaths of tens of thousands of wild birds.

The recent detection of the disease in a number of mammals, including foxes, otters, minks, sea lions and even grizzly bears, has sparked growing concern that humans could be more at risk.

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