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Veterinary experts from across Europe are meeting today to develop a strategy to stop the spread of a deadly strain of avian flu, which one British scientist has declared a national emergency.
The EU's response to the H5N1 strain of the virus, which claimed 57 lives as it swept rapidly west across South-East Asia and has now been detected on Europe's doorstep in Siberia, has so far been fragmented.
Today, leading British scientists said that it was inevitable that the disease would be carried across the Ural mountains by migratory birds.
They believe a co-ordinated strategy is essential to prevent a potential repeat of the 1918 flu pandemic, which killed 40 million - more than the First World War.
Professor John Oxford, of Queen Mary's School of Medicine, warned in January that the threat from bird flu "sent a cold shiver down the spine."
Today he went further, declaring: "This is a national emergency, how could it be otherwise? Resources are made available for natural emergencies and now many people are threatened by a virus which can decimate a country."
The two central strands to stalling the disease have been identified as stockpiling vaccines and introducing more effective surveillance measures, which will give warning of its presence at the first opportunity.
Hugh Pennington, one of Britain's leading food safety experts, said: "I've spoken to a number of senior public health officials and this is the one thing that keeps them awake at night. It's a very, very nasty virus and it would be an economical disaster if it got here, never mind the human impact.
"This is one of the nastiest potential threats we've faced for many years," he told the BBC.
The H5N1 strain of the virus, which was first detected in Hong Kong in 1997, emerged in Vietnam and Thailand in January 2004.
The virus is carried in wild birds and infects free-range poultry which mingle with wildfowl and can then be transmitted to farmers. It has so far only infected people in direct contact with birds, but the greatest fear is that it could mutate into a strain which can pass efficiently between humans, triggering a global pandemic.
In the Netherlands, where an outbreak in 2003 cost more than £100 million, all free-range chickens have been locked up. Belgium, Lithuania, Denmark and Croatia have recommended vigilance and German farmers have been told to take similar precautions by 15 September.
Many other nations - including Britain and France - are adopting a wait-and-see approach, and have advised against a mass cull of wild birds which they say would prove ineffective.
Copyright 2005 Times Newspapers Ltd