 I don't know about that. Yeah, if you got measles, then you wouldn't get it again or something? I think your body becomes immune to it after you've had it. Anyway, Dawson's disease is a rare presentation of the measles virus that can survive in the body long term without provoking an immune response. Once symptoms develop at an average age of seven years after primary measles infection, the outcome is invariably fatal. Measles is a very serious business.