The US Department of Agriculture said Saturday that new cases of bird flu have been found in a commercial chicken flock in Pennsylvania and a home flock in Utah, with the disease now spreading to more than 30 states in the country.
The ministry said earlier this month that it was looking at vaccines as an option to protect poultry from the deadly bird flu as the country grapples with its worst outbreak since 2015. The current outbreak has killed more than 20 million chickens and turkeys in commercial flocks since February.
The US Department of Agriculture said federal and state officials are jointly working to increase monitoring and testing in areas around infected swarms.
And US authorities said the newly discovered cases of highly pathogenic avian influenza were not an immediate public health concern.