Quantum physics says everyone can live forever, the drawback is that you are the only one that knows about it. Say you get a gun with 100 bullets and a 50% chance each time to either get shot or a missfire. There are only 2 possible outcomes, death or living. When the trigger is pulled both possible outcomes happen and reality splits into 2 different threads, one in which you die and one in which you don't.
Since the only reality you will be able to perceive is the one in which you lived, you will stay alive. The same goes for the next 100 bullets, and the same goes for everything in existance that has a possibility to kill you (even if you have terminal cancer the final chemical reaction that kills you could happen or it could happen a millisecond later, in your reality your death is always delayed for a millisecond).
Everyone will live forever, but there are infinite universes where you are dead, just as there are an infinite amount of dead people in your universe.
Are you saying that because we can't perceive death in this reality, we stay alive forever? So, when we do actually die, it's a different reality at that very moment in time?
Or maybe I didn't read it right.