For Potts the match was something he could never have imagined after his childhood illness.
"That was a time when people lost a quarter of their kids to childhood illnesses."
While vaccines have made some childhood illnesses rare, many others remain a fact of life.
One has to listen to hear the voice that a childhood illness reduced to a whisper.
But what if he gets some childhood illness and dies?
Others suspect that children are not exposed to enough childhood illnesses to build up their immune system.
You may not have heard of these childhood illnesses, but they are more common than you think.
I didn't know that after a lot of childhood illness he couldn't eat spicy food.
Chickenpox is a common childhood illness that children catch at some point.
The doctor considered it to be a routine childhood illness and looked no further in the early stages.