Playing Devils Advocate here .. Remember its a Magic Disease a Magic World and he IS Emperor, No ones ever recovered before but this is the Now Very Guilty Emperor of a Magic Kingdom that has resources others do not, IE bring me the beating Heart of that Angel, Horn of the Last Unicorn,And We got a Dragon Pearl in the Next Kingdom over? Go to WAR! And the Doctor said There is a Slight chance he can save her if he can find this Legendary Potion. (but she needs to be there for that to work) And the Emperor said her mothers Enemies will basically kill her soon as she leaves the Palace . On the other side of it She might of Just become the Favored in Line if she Recovers.. So there is that Irony.