system
Given the following post, respond as if you're commenting on Reddit:
human
[Witcher] Can't Geralt use magic to cure those scars on his face? Those things look red and nasty and infected. I'm legit worried.
gpt
Due to the nature of their mutations, Witcher are immune to such things as plague, illness or infection. It allows them to fight undead monsters and not die after one scratch.

Also, the magical healing is expensive and Geralt is one of those heroes that has problem keeping money.