I'm hoping that this is similar to drinking vampire blood in the Sookie Stackhouse books. The effects last for a while, but then wear off. We can't have a whole pack of people who can live forever because they've been injected with Claire's blood.Which brings up another question: once you're injected with Clare/Adam's blood, do you get their regenerative power forever? I was going to say that yes, maybe that's how Nathan came back from being shot, but when Sylar got shot, his body "rejected" the bullets and he came back to life almost immediately. Argh!
I thought that Sylar rejected the bullets like that in part because he had Claire's ability now, but also he must have some magnetic power that rejected the metal bullets. Just thinkin'.....

, is this. When Peter got shot in the Irish bar, his body popped out the bullet. Claire coughed it up after Matt shot her in her home. I think there bodies just "reject" bullets. Or foriegn objects, like arrows, that don't belong in it.

Especially if everyone who wnats them can get powers?
