system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5] If chemotherapy kills all rapidly dividing cells including healthy cells then how do the patients maintain health?
gpt
They often don't.  That's the problem with chemotherapy.  They get mouth sores, their hair falls out.  Their wounds don't heal well.  They can get nerve damage.  Some chemo can cause heart damage.  Some of the indiscriminately suppress your bone marrow and knock out your blood cells.

It's a game of getting a dose and duration that kills the cancer as much as possible, with as little toxicity to your other cells as possible.