Suspicions that there may be more bird flu going around undetected were backed by a voluntary serosurvey among veterinary practitioners who work with cattle, CDC investigators said. Out of 150 participating veterinary practitioners across the country,

H5N1 bird flu is branching out. New data from the Centers for Disease Control and Prevention indicates that a second type of H5N1 has likely spread from dairy cows to humans.

The Wyoming Department of Health said on Friday it has identified its first human case of H5N1 bird flu in the region, making it the third confirmed instance of hospitalization related to the infection in the United States.