USDA is now ordering all dairy cattle must be tested prior to moving the animals across state lines as a way to help stop the spread of HPAI H5N1 impacting dairy herds across the country. This comes after a lab at Ohio State University detected genetic material of the virus in 38% of retail milk samples they’ve tested, data that also suggests the current outbreak is being underreported.

In a new Federal Order announced on Tuesday, USDA says in an effort to protect the U.S. livestock industry from the threat posed by highly pathogenic H5N1 avian influenza, there are a number of actions being taken with federal partners to limit the spread.