What is john poem a fever about?

There isn't a widely known poem titled "John Poem: A Fever." It's possible that you might be thinking of a different poem or a different title.

To help me understand what you're looking for, could you provide me with more information? For example:

* The full title of the poem.

* Any other details about the poem, such as the author, the time period it was written, or any specific themes or imagery.

* Where you encountered the poem.

With more context, I'll be able to help you figure out what you're looking for!