Why dangerous bird flu is spreading faster and farther than first thought in U.S. cattle

New Why dangerous bird flu is spreading faster and farther than first thought in U.S. cattle Infections could have been 'flying under our radar for months,' researcher says This story is part of CBC Health's Second Opinion, a weekly analysis of health and medical science news emailed to subscribers on Saturday mornings. If you haven't subscribed yet, you can do that by clicking here . A dangerous type of bird flu virus discovered in the lung of a U.S. dairy …