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 severity of hemorrhagic fevers varies, but they can lead to serious complications and high mortality rates. Diagnosis typically involves laboratory tests, and treatment focuses on supportive care, such as hydration and pain management. Preventive measures include avoiding contact with infected individuals and controlling vector populations.