Study reveals why bird flu affects cattle differently, pasteurizing milk kills virus

PITTSBURGH, Pa. — When H5N1 bird flu first began infecting U.S. cattle in early 2024, diagnosis was elusive, because in cows, the disease looked completely different. Instead of affecting the lungs, as H5N1 does in other mammals, it caused severe infection in the cows’ udders, largely sparing the lungs.   A study by University of Pittsburgh School...