Some virus laid me low

I hardly ever get sick, so when I felt a little under the weather Thursday I went to work anyway. I felt pretty good Friday and Saturday, but on Sunday some kind of virus hit me like a tsunami. I didn't feel like getting up off whatever bed or couch I was lying on, but I was a bit agitated so I kept moving from one place to the other. I just didn't feel like doing a thing, had no energy. Chills and fever. I felt the same way on Monday and did stay home from work,as I'm doing today. I feel considerably better today, but far from 100%. This is all unfamiliar territory for me, but I guess some nasty bug found a way past my immune system. I hate it.