I follow the same rules as my illness policy for the children ~ if I have vomiting or diarrhea I stay closed 24 hours symptom free or if I have a fever over 101 until the 'cause' is confirmed and treated .... otherwise I work through the nasty common cold, migraines, sciatica back pain had a broken rib this winter and worked through that and like others said we just have a 'quiet laid back day'.