I work in an ER and people are always hacking on me, etc. Good handwashing is a must to keep from getting sick! When I teach class I always wash my hands after each one and do not hesitate to ask coughing students to cover up or sit out. Some people just don't understand common courtesies and/or are uneducated so I include the "germ talk" in my class wrap-ups throughout the cold/flu season.