Although California dairy farmers anticipated a bird flu mortality rate of less than 2%, some say between 10% and 15% of infected cattle are dying.| Los Angeles Times
A 3-year-old girl from Durango, Mexico, has died from H5N1 Bird Flu, according to the World Health Organization. The child had no preexisting conditions.| Los Angeles Times
A new strain of bird flu — H7N9 — is detected in at a poultry farm; scientists learn that past human flu exposure may provide some immunity to H5N1.| Los Angeles Times
A new H5N1 bird flu mutation has appeared in a cluster of infected dairy cows. It's a genetic change that scientists say could not only make the virus more lethal, but increase its spread between mammals and possibly humans.| Los Angeles Times
Dairy industry experts say the virus entered California after local cows were shipped to another state and then returned to California.| Los Angeles Times