system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can cancer naturally cure on it's own without the person ever knowing they had it?
gpt
Cancer is caused by a mutation in cell replication. Our cells go through checkpoints to make sure everything is replicating right. If something is wrong, the process is usually shut down. If it makes it past this point without being shut down, the immune cells typically will destroy the mutated cells before they can spread. Your body basically is constantly making and killing cancer cells. The problem occurs when these cells get past these protective mechanisms and are able to duplicate.