U.S. Bird Experts Mystified by Midwest Avian Flu Spread
From the article:
A virulent strain of avian flu that has killed turkeys in the heart of the nation’s poultry region has been found through molecular testing to be nearly identical to viruses isolated in migratory ducks.
Once it arrives, avian flu can spread rapidly through a flock, killing birds in as little as 24 hours. The virus has not been identified in humans and is not expected to pose a public health risk, according to the USDA.