A family member had acute kidney failure back in the mid 60s, when kidney transplantation was still quite new in the UK where she lived. She was in her early 20s and it wasn't looking good as they had no donors.

Just as they were about to draw the line, a 17 year old kid who had been riding a motorbike was brought in, and fortunately for her it was a match.

After the transplant, she was told she most likely wouldn't turn 30. Turned that due to that message she decided to never have kids, as she was worried she'd pass away before the kid grew up. That was a real shame, as she had a long and quite normal life, almost reaching her 70th birthday.