Two dairy workers in California were infected with bird flu, the 15th and 16th human cases detected this year in an ongoing outbreak affecting the nation's dairy cows, health officials said Thursday. The latest cases were found in workers who had contact with infected cattle in California's Central Valley, where more than 50 herds have been affected since August. The workers developed eye redness known as conjunctivitis and had mild symptoms. California health officials said the workers were U...