Desmond's injury?

I was remembering back to the last time we saw Desmond in s5, and he was recovering from a gunshot wound. Now, I don't think a lot of time has passed since Ben shot him and Widmore brought him to the island (maybe 2-3 weeks?), and when we saw him, I didn't notice any bandages on Desmond's shoulder. Any ideas what this could be about? Did the island mysteriously heal him to prepare him to come back? Is he injured still and the bandages were hidden? Has more time passed then we suspect?

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