the clinic who will do the examination of your wife to give her a clearance.  They are very strict about lung x-ray eventhough it's healed, if they found scar, they still reject. If ever she would be given clearance back home, her x-ray here would again show the same result and then you need to convince again the authorities here that she's already healed.

So, in one word, my friend, LUCK.  I know some who had that LUCK, but I also know many who are unlucky!