text:  A new study giving reassurance that heat treatment, also known as pasteurization, kills bird flu virus in cow's milk. When bird flu was first detected in U.S. dairy cows earlier this year, there were no studies of whether heat treatment killed the virus in cow's milk. A study in April found dead remnants, but no live virus. The Food and Drug Administration was encouraged by studies on the pasteurization of eggs, which killed the virus.