system
Given the following post, respond as if you're commenting on Reddit:
human
[The Stand] What happens to the more supernatural elements like vampires and Pennywise?

So, Stephen King's shared universe has a lot of different things that go bump in the night and eat people.

What happens when their food supply is cut short?

I don't know if the vampires can get the flu, I believe in the Dark Tower, it was said that they could act as carriers for various diseases. 

With everyone dead, what's gonna happen when Pennywise wakes up, or the vampires start getting hungry? Will they starve?
gpt
Pennywise doesn't need humans specifically he just prefers us for our flavor. As for other things dependant on humans for survival they'll slowly die out or resort to feeding on each other if possible.