A Bio Safety Level 4 virus, Junin causes Argentine Hemorrhagic Fever (AHF). AHF progresses in two separate stages. First, the patient will begin to experience fever, headaches, and weakness. The second stage, which occurs less than a week after initial symptoms set in, contains far more severe symptoms including a rash, blood, shock, seizures, bleeding from various orifices, low blood pressure, and coma. Junin’s incubation period typically lasts between 10-12 days. It has been placed in the Arenaviridae family of viruses. Humans are usually infected with Junin virus after making contact with the excrement of an infected rodent, often occurring when ingesting infected food or water, inhaling particles of the virus from dried urine, or touching something infected with broken skin. Currently, treatment with plasma from recovered patients, if administered in a timely manner, has been remarkably successful. There is also a vaccine available that boasts a 95% success rate. If properly treated, the mortality rate for Junin virus is extremely low at only 1%. However, if left untreated or treatment is begun too late, the mortality rate jumps to 15-30%.