I don't know if I'd consider zombies fragile. They have no fear or pain. The drive to spread the virus through biting is all-encompassing, and they can only be put down by a head shot. The premise of most zombie stories is that the virus spread fast, and once it had been determined that the impossible was actually taking place, it was too late to implement an effective plan of action.
That being said, I do believe that military forces would be able to contain such an outbreak in real life.
That being said, I do believe that military forces would be able to contain such an outbreak in real life.