When you say you sweated it out, did you train it out or did you sweat from the fever?

In my opinion you shouldn't force a sweat on, you can sweat virus out of your system to some extent but the exertion whilst Ill is a very bad idea.

I've had a fever and woke up covered in sweat the next day and felt fine, I think if it can be sweated out, you body will induce a fever.