The last thing you expect when you go to the hospital is to get an infection, but that's what happens to millions of people each year. Hospital-acquired infections are often deadly and diagnosing them can take days.
In fact, one in every 20 patients gets an infection related to their hospital care, which creates more than $25 billion in cost. The Centers for Disease Control and Prevention has named the elimination of hospital-acquired infections one of its "Top Ten Winnable Battles."
One of the major problems is that bacteria found in hospitals has been evolving for generations. These organisms are subjected to antibiotics and disinfectants constantly, so those that survive are considered superbugs.