You never know where the virus came from, honestly could be as crazy as someone sneezing in the isle at the grocery store and you pick up a box of cereal just after the sneeze, picking up more than just your breakfast! nothing we can do regarding contracting the virus, but MUCH we can do in terms of spreading it to others. I almost never get sick anymore, built quite an immunity over the years, but when I am so sick, If I feel awful and barely keep on the go as ussual? I close. You know if you have a nasty virus super contagious or just a run of the mill cold, average colds or sinus infection nothing you can do about it, just wash hands lots and of course refrain from holding kids too much or kissing and hugging...but if I have a tummy bug or am literally down and out and just need rest to get well, I will close and take the cut in pay. Over the years I have had few who complain when I close and if they do, I point out to them...I am only doing my best to keep the bug from all the others. Try to set an example to all parents the fact that I dont take illness lightly, if I close when I am under the weather, they are a lot less likely to try and bring their kids when they are under the weather, not to mention in setting the example of not spreading from my part, it is much easier to tell them....I don't do it to you, so please don't do it to me! if you work sick, they will feel more inclined to drop their kids off sick and so on! I hate illness!