The USDA is investigating the spread of the H5N1 virus in livestock across nine states, detected in 34 cattle herds. Despite this, they assure the safety of the meat supply, emphasizing rigorous inspection processes. The FDA found virus fragments in commercial milk but confirmed pasteurization's effectiveness. Only inspected meat is sold, with veterinarians present at slaughter facilities. The USDA stresses ongoing efforts to ensure food safety, with Dr. John Brownstein advocating for continued investigation.