 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. Smaller studies had mixed results, but a new, larger, more complex one at a federal research center in Athens, Georgia, indicated pasteurization does kill bird flu in milk. Chuck Sievertson, ABC News.