There is a very big difference between the headline of "Bird flu virus found in pasteurized milk" and the real message "fragments of the bird flu virus had been detected in some samples of pasteurized milk in the U.S.". Turning potential health hazards and threats into harmless particles is the very job of pasteurizing. That is excactly why we pasteurize milk.
Heck, the virus particles could even evoke immune reactions, thus vaccinating us in a natural way. Just by drinking milk.