AP News reports:Although bird flu has become somewhat common among poultry, its spread to cattle has added to worries about the disease. In May, a second dairy farmworker was diagnosed with bird flu, and the virus was detected in both beef and milk. It has been confirmed on dairy cattle farms in nine states.

Health and agriculture officials have said the risk to the public remains low. The U.S. Department of Agriculture said the meat from a single sickened dairy cow was not allowed to enter the nation’s food supply and beef remains safe to eat.

Workers exposed to infected animals are at a higher risk. The only three human cases confirmed in the United States included two dairy workers and one man working to slaughter infected birds on a poultry farm.