A current spike in measles cases in the U.S. might have some wondering, should they get a measles booster shot, even if they were vaccinated as a child? An infectious diseases doctor in Seattle said more of his adult patients are inquiring about this. "I would say my colleagues in pediatrics often think about measles much more frequently, but unfortunately, even in adult medicine, now we have to be thinking about it as well," said Dr. Seth Cohen, the medical director of infectious diseases at UW Medical Center. "I think there is a more general awareness that people may not be immune, or there may need to be additional boosters," Cohen added.