When you're really sick, does your child understand? Do they give up some of the things you typically do in the day with them, knowing this is only temporary? Do they try to make you feel better?
I'm miserably sick right now and last night my daughter came into my room to ask for something (I don't even remember what now). I walked her back to her room, told her I couldn't stay a few minutes because I was too sick. She actually said, "Okay mommy, feel better" and rolled over in her bed. Sweetie.
Do your kids understand when you're sick?