Rules intended to maximize sanitation and avoid the spread of infections and disease are prevalent in hospitals. 

And yet, most hospitals don't require their employees to get flu shots, according to a survey from a team of University of Michigan researchers. The poll was conducted in 2013, but was only recently reported in a new paper published in Infection Control and Hospital Epidemiology, a medical journal. 

When the survey was conducted, just under 43 percent of the infection preventionists at 386 hospitals said that their hospital currently required flu shots for staff. However, an additional 10 percent said their hospital would begin to require the shot for the next flu season. That means it is likely that, two years later, a majority of hospitals are making their doctors, nurses and administrative employees get the vaccines that they keep telling patients they need to get.