From the perspective of planning one's week, I don't think there is any toddler malady worse than a head cold. It's right in the middle between "Oh, she's staying home today" and "Meh, daycare will deal." because it can clear right up or get worse by virtue of the fact that the kid can't sleep while coughing.
So the debate begins.
She's not that bad right? She hasn't coughed in a bit. Do we just send her hoping everything is fine? Maybe it will be and we can both get a full day at work, but if she gets 'kicked out' at any time during the day one of us has to leave work immediately and on short notice. To make matters worse, they ask that she not return for 24 hours.
You lose, back two spaces.
Commence schedule comparison. What do you have this morning? What can get done from home? How about each taking half a day? What about taking her to work? Where will she have the easiest day so she can get better quickly and our schedules can get off the tilt-a-whirl?
Where is the sweet spot that allows us to take the least amount of work off while getting her healthy the fastest?
We do this probably a dozen times a year and sometimes we get it right and others we don't, but it never fails to throw a monkey wrench in the best laid plans.