Before we start this discussion I'll point some things.
#1 Humans already have regeneration. We can see our wounds regenerate itself on our skin.
#2 Games like CoD, Uncharted and more that uses this regen concept are actually takes seconds to fully regenerate injuries. Is this possible in IRL? Discuss
#3 Some organs of the human body CAN regrow but it takes weeks, months or even years!
#4 Health packs/kits are widely used on battlefield. But in games, it also takes seconds to replenish a portion of your health. Is this possible in IRL? Discuss.
#5 Find out about X-stat, a new medical appliance made last year. (I guess..)
Read about Xstat here
Also, discuss which is better.