I was also thinking about this, and I think that Claire might be dead.
I think this mainly because she was in Jacob's cabin.
Also if I remember correctly before she took off by herself into the jungle, Miles was reacting to her strangely, and we know he has some ghostbuster powers or something.

If she is dead, it could be simuliar to Christian and could explain why Christians body wasn't in his coffin. IDK it is kinda weird.

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Doctor playing golf. Woo, boy howdy, now I've heard everything. What's next, cop eating a donut?