The Toxic Lady
Gloria Ramirez was fighting an advanced case of cervical cancer in 1994, when she was rushed into the hospital suffering from confusion, irregular heart beat and trouble catching her breath. When nurses tried to sedate her to calm her down, they found that nothing was working. They decided to defibrillate her heart to get her normal rhythm back, when the noticed that she was covered in an oily sheen and her breath smelled like a fruity, garlic-y mix. As well, when they drew blood, it smelled like ammonia.
As soon as the blood was drawn, however, nurses started feeling nauseous and fainting and after 3 of them fainted, they evacuated the emergency room. Over 23 people became sick, and 5 were so bad that they had to be hospitalized. A special crew, in hazmat gear, went into the hospital to care for her, but Gloria soon succumbed to kidney failure. To date, no one knows what what it was about Gloria that made her so toxic and affected the hospital staff.
This case, is one of the few real-life cases that influenced an episode of the X-Files.