Per the CDC:
Viral hemorrhagic fevers (VHFs) are a group of diseases that are caused by several distinct families of viruses. The term “viral hemorrhagic fever” refers to a condition that affects many organ systems of the body, damages the overall cardiovascular system, and reduces the body’s ability to function on its own. Symptoms of this type of condition can vary but often include bleeding, or hemorrhaging. Some VHFs cause relatively mild illness, while others can cause severe, life-threatening disease. Most VHFs have no known cure or vaccine.
To learn more visit: What are VHFs? | Viral Hemorrhagic Fevers (VHFs) | CDC
