Why unprecedented bird flu outbreaks sweeping the world are concerning scientists - Nature.com

Mass infections in wild birds pose a significant risk to vulnerable species, are hard to contain and increase the opportunity for the virus to spill over into people.

Cranes are among the species dying from avian influenza.Credit: Heidi Levine/SIPA/Shutterstock A highly infectious and deadly strain of avian influenza virus has infected tens of millions of poultry… [+5943 chars]

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