Scientists and veterinary experts were today discussing how to reinforce the European Union's protection against the avian flu virus, which has evaded existing measures to spread into five member states. Germany and Austria last night became the latest countries to report that preliminary tests on dead swans had revealed presence of the fatal H5N1 strain, which has killed about 80 people in South East Asia and Turkey. Tests to confirm the German and Austrian results were continuing at the EU’s monitoring laboratory in Weybridge, Surrey. The strain - which scientists fear could mutate into a virus capable of being passed...