The U.S. Department of Agriculture (USDA) has announced that ground beef samples from retail outlets in states with bird flu-positive dairy cows have tested negative for the H5N1 bird flu virus. The USDA also confirmed that dairy products such as cottage cheese, sour cream, and milk, both in retail and infant formulas, show no presence of the live H5N1 virus. However, genetic fragments of the virus have been detected in 20% of retail milk samples, indicating wider spread among dairy cows than initially thought. Despite these findings, there's no consumer health concern as the agency continues to assess the situation and affirm the safety of the meat and dairy supply.