Brazilian hemorrhagic fever (BzHF) is an infectious disease caused by the Sabi virus, an Arenavirus. The Sabi virus is an enveloped RNA virus and is highly infectious and lethal. The incubation period is between 716 days, during which signs and symptoms can develop. Initial signs and symptoms can include fever, eye redness, fatigue, dizziness, muscle aches, loss of strength, and exhaustion. Severe cases show signs of bleeding under the skin, internal organs, or from body orifices like the mouth, eyes, or ears. Severely ill patients show shock, nervous system malfunction, coma, delirium, and seizures. The Sabi virus can be acquired through inhalation, ingestion, the eyes, and contact with urine, saliva, blood, or feces of rodents. The Sabi virus is a Biosafety Level 4 pathogen.