Analysis
Analysis
Bird flu tops list of viruses likely to cause another pandemic – so authorities are on high alert
As avian influenza is found in a sheep in Yorkshire, the close contact humans have with domesticated animals is an extra worry because the virus has more opportunities to jump species again – but swift action by the authorities can reduce the chances of further genetic changes.
Image:
A colourised electron microscope image of avian influenza H5N1 virus particles (yellow) with animal kidney cells (blue). Pic: AP
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