According to Christianity, as recorded in Bible:
Genesis 2:16 And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat:
Genesis 2:16 And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat: 2:17 But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.
I believe that Man was never meant to die but death became inevitable when man sinned against the Almighty God.
Then can you give any example of immortal human according to Bible as there may be some human who haven't done any Sin.
But according to hindu mythology there are asta chiranjivi which means 8 immortal human if you believe,