Bird flu's wild range

A polar bear in the Arctic, red foxes in Europe, penguins in Antarctica and a wide range of other wild animals have been infected with the flu virus strain currently spreading in dairy cattle in the U.S. Why it matters: Up to 75% of new and emerging infectious diseases in people come from animals, and most of those can be traced back to wildlife. Monitoring wild animals for diseases can help scientists identify emerging health threats. • Government agencies in the U.S. and around the world monitor wild birds for...