Originally Posted by rjshae 
While I agree that scientific realism is a good thing in a story, RPGs have never been plausibly realistic in terms of elements like wounds management. It would be interesting if they include a plausible mechanism for the latter, say like limited nanotechnology self-repair.
The original only had wounds healed by time, no med kits or potions. On the official W2 forums it was posted that wounds will be healed by time again and they're considering other more immediate options but those weren't in the game for sure yet, depending on play balance.
I've always thought the explanation of an injection of stem cells with a chemical cocktail to induce rapid growth was a decent explanation for any futuristic med kits.