There is no guilt to live with. It’s not like he knew.
It appears he probably does know now, based on this:
The man is healthy, and was healthy at the time of donation — he passed the necessary screening checks to donate, but some of his cells’ DNA mutated before he was born, damaging the TP53 gene, which plays a crucial role in preventing cancerous cells from spreading.
While most of the donor’s body does not contain the damaged gene, up to 20 per cent of his sperm do, the investigation found.
I hope he doesn’t need to find out. But if he’s alive unfortunately he needs to be contacted. I’m not sure if I would live with that kind of guilt.
There is no guilt to live with. It’s not like he knew.
It appears he probably does know now, based on this: