Evidence Points to Migratory Birds in H5N1 Spread

With the H5N1 avian influenza virus racing across the globe, scientists are debating new evidence on the role of migratory birds. As Science went to press, the virus had just been confirmed in a third African nation, Niger, one of the world's poorest countries. It had spread further in Europe and Asia, with 13 countries confirming outbreaks in just the past 2 months. And France reported the European Union's first outbreak in domestic poultry.