Well, this has been an awful day.
I've been ill for a month. Initially I thought it was a chest infection. I live like a hermit, so the chances I caught something contagious must be very small. Non-zero, but very small. It'll pass off soon.
It didn't pass off. Every time I think it's on the wane, it comes back with a vengeance.
Today I was so confident that I went to the Queen Victoria Market to stock up on minimum dietary requirements. I was still coughing and a bit sniffly, but otherwise feeling much better. Wearing a mask, of course. The residual coughing I could put down to wear and tear over the last month. And I'm always somewhat sniffly, due to being pale, shy, and bookish; not at all hardy and replete with stout British character.