Germs in pen and ink

This week's Illustration Friday prompt is germs. Having spent what seems like the last month trying to shake a very stubborn cold, the idea of doodling germs didn't exactly appeal to me.

So, we have this instead. An abstractish line study (sure, let's call it that) of something that's been all too familiar to me in the past while. And what is it, exactly? Well, maybe I should put the answer down in the comments for those who are keen to guess...