One thing I do is if a student sneezes, I have him/her rinse off their hands.
According to our town health nurse, just washing (scrubbing hands together)
under water 30 seconds (no soap necessary) is enough to clean off germs. I
have to say, the fall of my first year is the only time I have been sick. I do
scrub tables, vacuum the room and am constantly washing my hands (mostly
because they get messy). I think that helps.