system
Given the following post, respond as if you're commenting on Reddit:
human
Are we constantly getting small amounts of cancer cells and having our immune system kill it immediately?

A weak immune system increases the risk of cancer, so this prompted this question in my head.
gpt
The short answer: yes. natural-killer cells, part of the T-cell lineage, are meant to pick these neoplastic cells off before they become too numerous and cause problems. As another poster mentioned, there are numerous mechanisms within the cell that can allow the cell to correct genetic damage, and if all else fails, to commit cellular suicide (apoptosis). This may occur if things have gone wrong beyond the cellular ability to repair the damage.