I haven't worked out this week due to illness. Almost all last week I had a tickle in my throat; Sunday night it kept me from sleeping well, by Monday it turned into a cough, and Tuesday I missed work with a bad head cold. This morning I feel better, but will work from home. I don't think I'll work out until tomorrow.
This illness is frustrating. When I was at my peak in training, I recall going for months and months and months without getting sick. Now I've been sick twice in the course of a month or two.
I feel like when you're starting to train, illness reaches up and tries to drag you back to being unhealthy. Not very scientific, I know.