Hemorrhagic fevers are a group of illnesses caused by several different viruses, leading to severe symptoms, including fever, fatigue, and bleeding. Common examples include Ebola and Dengue fever. These diseases can be transmitted through contact with infected bodily fluids or vectors like mosquitoes. The symptoms of hemorrhagic fevers can escalate quickly, often resulting in shock and organ failure. Diagnosis typically involves laboratory tests, and treatment focuses on supportive care, as there are no specific antiviral medications for many of these viruses. Prevention strategies include vaccination and controlling the spread of vectors.