Have employees who are feeling a little under the weather?  Are they still at their desks hacking and wheezing away trying to get through the work day?  Next time, make them stay home -- or so says this article from HBS Working Knowledge:

Employers worry a lot about absenteeism, but new research suggests a bigger threat to productivity is “presenteeism”: sick workers who show up at work but are not fully functioning. U.S. companies may lose $150 billion (yes, that’s billion) annually because of presenteeism, according to some estimates.

Now, tell them to go get that bowl of chicken noodle soup.