With all the antibiotic everything killing 99.9% of bacteria, we still have that .1%. That stronger bacteria that can withstand that antibiotic, and now has no competition to grow. Also Doctors are dishing out antibiotics for almost everything, or at least I've notice around here within the people I know. And the some bacteria will withstand that, and have a clean slate to grow and transfer to new hosts. On top of this we got TV ads describing how horrid these germs are and are harmful to your family. Creating people who raise children with this fear and weaker immune systems because they've never encountered these germs.