Personally, I think we've weakened our immune systems by washing everything with antibacterial soap. When I was a kid my mother never stored the mayo in the fridge, it was kept on the shelf just like the canned goods (I always hated the yellow glossy part of the mayo). Us kids never missed a day of school for illness. I don't even remember being sick. I think a small dose of coodies every now and then is a good thing. I have another long story to tell but I'll spare you all until another day.