I thought the greyscale that affects children and the greyscale affecting Jorah are technically 2 different things. Many children survive greyscale and become immune to the deadly kind, but are disfigured.

EDIT: From A Wiki of Ice and Fire:

Greyscale generally affects children, especially in cold damp climates. The afflicted flesh stiffens, calcifies, and cracks. The victims are disfigured, but also rendered immune to the rarer fatal form and to the grey plague.[3] The free folk consider people who survive greyscale unclean, and prefer to euthanize them rather than take the chance that they may live to infect others.[4]
The mortal form of greyscale begins by affecting the extremities, noticeable only by a blackened fingertip or loss of sensation. As numbness creeps up a person's arms or legs, the flesh stiffens and grows cold, and the victim's skin will turn grey, resembling stone.[3] Blindness is common when the stone reaches the face,[3] and the tongue and lips turn to stone.[5] In the final stages, the curse turns inward, affecting muscles, bones, and inner organs. Although the disease is supposedly not painful, near the end, all victims go mad.[3]

So I wonder if the cures would be the same.