Question

I am a 8 letter word. most humans would like to have me. but they hate first 4 letters of my name. if u get the 2nd 3rd and 4th letter you are sick. the 5th 6th and 7th is something with a change.what am I?

Answer 1

the answer is billion

first four letters bill

2,3,4 letters ill

5,6,7 is ion

Answer 2

Billion

1,2,3,4 Bill

2,3,4 Ill

5,6,7 Ion