One of the possible versions of the third question in the sorting hat quiz on the old Pottermore read:
A troll has gone berserk in the Headmaster's study at Hogwarts. It is about to smash, crush and tear several irreplaceable items and treasures, including a cure for dragon pox, which the Headmaster has nearly perfected; student records going back 1000 years and a mysterious handwritten book full of strange runes, believed to have belonged to Merlin. In which order would you rescue these objects from the troll's club, if you could?
But a cure for Dragon Pox had already been discovered in the sixteenth century:
Gunhilda of Gorsemoor
1556 - 1639
One-eyed, hump-backed witch famous for developing a cure for Dragon Pox. When she died, everyone who knew her felt great sorrow, for she was a talented and hardworking healer (fw37)