Stop the spread now:

>> California has recently seen a significant rise in detections of H5N1 in dairy herds. Experts believe that animals at as many as half the dairy farms in California are infected. That is why it is important to pasteurize milk, which kills the virus. (All milk sold across state lines is pasteurized; 30 states allow the in-state sale of nonpasteurized milk, which is labeled “raw.”)

>> Two states, Colorado and Pennsylvania, have agreed to test pooled milk from all farms before pasteurization to monitor spread. Bulk milk testing should be mandatory in all states with dairy farms to determine the full extent of the infection on these farms and also allow us to contain the virus. As if to underline the importance of such a mandate, bird flu was detected in raw milk bought retail last Thursday from a dairy producer based in Fresno, Calif.