"Raising your temperature? That's gonna kill you!"

"Only if I die."

Lololol. The resistive mechanism makes you insane. Literally...

There was a video by a medical channel(actual doctor) I follow on Youtube that explained why the body temp increase happens during an infection in one of his recent videos covering the Hantavirus situation.

TD;LR: Its that parts of the immune system get sigificantly more effective with a slightly increased temperature.

And the plague stays...

hehe stupid human body