system
Given the following post, respond as if you're commenting on Reddit:
human
Why is cancer much more relevant now than it was a century ago?
gpt
Don't quite understand the question, but cancer tends to be a disease of older people and people live much longer nowadays.

So, if you die of an infection at 32, you don't live long enough to die of colon cancer at the age of 55. Also, diagnostics have improved, so people are now correctly diagnosed with a cancer where in the past they may not have been.

Cancer has been around for a long, long time.