How do Christians explain the reason for the seeming unfairness or someone being born with a health issue or disadvantage?

Some people are born lame, some blind, some rich and some poor. The Chinese believe that this has much to do with our previous lives. If we were someone who stole, we would be born without arms in this life, for example.
How do Christians explain this? 

Clarify • Share • Report • Asked October 20 2017 • Anonymous