Thank you, fortunately I don't have it myself but three of my family members do.

> At least it can be cured?

If you catch it early enough you can get complete recovery. If you catch it a little later you'll have symptoms lasting for months or years, if it starts to progress you might be able to arrest it at some level or slow the progression but it will always keep trying to get worse. And once you reach any of the advanced stages it can not be cured, you're stuck with it for life.