The numbers on influenza are staggering. For instance, 66% of health care workers didnt get an annual flu shot in 2005. [1] Likewise, 58% of employees in a recent survey know a coworker who came to work sick or with the flu, thus possibly infecting others and reducing employee effectiveness. [17] And since influenza can be fatal among many high-risk groups, its just as important for you to get an annual flu vaccine as it is for the people you come in contact with—so you dont spread the flu to others. [1]