I am a 5 letter word,
If all the 5 letters are available I am a talent in you,
If you remove my first letter I will die,
If you remove my first 2 letters I will be sick.
Who am I?
The first 3 comments that have the correct answer will be awarded with the reward system

If you are new to the concept check out how bounties work here with this link . There are tutorials in various languages.