Influenza is like a surprise guest. It shows up when you least expect it and you have to make accommodations for it, no matter how much you want it to leave.
There are few worst workplace interpersonal issues that one must deal with than a co-worker with the flu who has dragged themselves to the office. Here’s a list of do’s and don’ts on the job, care of the Centers for Disease Control and Prevention (CDC) as reported by Forbes: http://www.forbes.com/sites/jacquelynsmith/2013/01/17/flu-season-etiquette-what-you-need-to-know-about-sickness-and-the-office/