Because Mercedes caught the flu.
This is influenza, not stomach flu. I have been:
Coughing up lung, to the point that at one point I thought I had torn diaphragm muscles. They're still sore and it hurts to laugh, cough, and breathe.
Exhausted merely by taking a shower to the point I have to lie down.
Sleeping about 12 hours (or more) at a stretch.
Pushed to the limit to get my paying work done.
I'm guessing it's going to be at least another week before I'm over this, so please be patient.