Hospitals

You're positively healthy

Coincidence? I think not

You are positively infected with HIV

And sometimes the bathroom your pregnancy test is positive

I'm positive you completely failed this class. I'm positive there is nothing you can do to keep this job. "positive" is just a confirmation of something, so yes if you are checking for a deadly disease, of course positive means bad

I'm positive that I accidently might have cut his lung with the scalpel during the surgery.....

This would be an example of absurdity. Most of the patients I took care in the ER would almost collapse when I would tell them that all the test were negative. Very good!

"Your breasts look positively glorious!"

Biology: the only time when multiplication and division mean the same thing