system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Can sitting in water kill you eventually?

You hear of stories from WW2 and stuff where they get trench foot and the foot would have to be amputated.  Can this kill you and if so how long to do so?
gpt
Trench foot can progress to gangrene when enough tissues of your body die.

The dead and dying tissue is a very good environment for bacteria or fungal infections. Eventually, these infections can get into your blood supply. The infections or the toxic byproducts circulate through your blood which causes a whole body-wide immune response (sepsis) which can lead to death.

Amputations are done to prevent this from happening. The time it takes to kill you really depends on how fast your cells are dying and the type of infection.