When the World Health Organization requires researchers to wear pressurized biohazard suits and go through a series of showers, vacuums, and ultraviolet light to handle a pathogen, you know it’s bad news. The Marburg virus, which causes Marburg virus disease, requires such handling. With symptoms very similar to the Ebola virus, the disease can be overlooked and mistreated, and with an average case fatality rate of 50% over the course of 12 different outbreaks, overlooking proper treatment can be deadly. Even if cured, though, the virus can reactivate, causing a secondary case of Marburg disease. Typically 8 to 16 days into incubation, patients can succumb to multiple organ dysfunction syndrome.