hail and strong winds are possible. All traces of the bird flu virus are found in pasteurized milk. The Food and Drug Administration says it tested milk samples from cows across the nation in. So how safe is it to buy that gallon of milk from grocery stores? NBC Bay Area's Gia Vang went to the experts to find out. Infected herds of dairy cows. The Food and Drug Administration says fragments of H5n1, also known as bird flu, has been found in 1 in 5 samples of pasteurized milk signaling different reactions from shoppers. I drink a lot of milk, too, and my dad drinks a lot of milk, so it's a little scary. I don't think it's that dangerous. It's not. According to UCSF infectious disease doctor Peter Chin-hong. So the pasteurization kills it. But it doesn't mean that it vacuum cleans it out. But it's likely not going to affect anybody. As of yesterday, the FDA says bird flu had been detected in 33 herds in eight states. California not on the list. If 1 in 5 samples are infected, it means that many more cows than the 33 outbreaks in eight states are probably around. But so far it's not really crossed over to humans yet. For now, the virus does not spread easily between people, and only two cases have been reported in the U.S. So for clinical chemist Doctor Nam Tran at UC Davis, it's more testing and monitoring by the CDC and FDA. They also would potentially look at if the detects material in the milk was actually just nucleic acids, which is not necessarily infectious, but they can test it with, say, an egg yolk based test where they can see if the virus grows or not. If it replicates, then it's potentially infectious. So if