...being sick no longer means getting to curl up in bed/on the couch, with blankies and TV, and someone bringing you hot tea and soup, so you can rest and get well.
Instead, it means hacking and sneezing your way through 4 loads of laundry, 2 loads of dishes, cleaning the kitchen, making dinner for everyone, and getting your own NSFW-ing soup and tea.
Or hauling your wheezing carcase down to the grocery store for orange juice, 7-up, and Chloraseptic, if you don't want to go without.
Or going to work anyway because you're out of sick time and don't want to lose your job.
I never realized how much nicer it was to be sick when I was a kid, until I became a grownup.