> So many reasons why you might be sick for one day.

I'd bet a fair few "under the weather" days are because people have mental health issues but aren't going to announce that publicly (due to the ongoing stigma.)

I've been sick so often now (thanks kids) that I can feel _immediately_ when something is coming on. Rather than be down and useless at home and work for 2 or 3 more days, I tag out, go to bed and usually knock it out in a night. I feel like that's way better for me and everyone else overall.