Both sides of it, but not exactly it

Rico says there's a song from his childhood that's been running through what passes for his brain of late; it's called 98.6, by some singer named (just) Keith:

Hey 98.6 it's good to have you back again, oh
Hey 98.6 her lovin' is the medicine that saved me

The reason? Well, Rico's temperature was over 100 for two days (so if he sounded a little delusional since the weekend, that would be why), and now it's 'only' 99.1, after being below normal earlier today. As for 'her lovin', that would be the ladyfriend, of course. She hates it when I'm sick...