Bird flu update: Maps show states most affected - USA TODAY
- Bird flu update: Maps show states most affected USA TODAY
- Video California bird flu emergency ABC News
- Avian influenza: Bird flu spread triggers state of emergency in California Livescience.com
- What to know about the bird flu outbreak as concerns about U.S. cases grow The Washington Post
- Rapid spread of H5N1 bird flu through California dairy herds suggests unknown paths of transmission STAT