An infectious disease caused by certain viruses or bacteria that can damage the walls of tiny blood vessels, making them leak, and can hamper the blood's ability to clot and cause severe, life-threatening illness. [ https://science.jrank.org/pages/3289/Hemorrhagic-Fevers-Diseases.html https://www.mayoclinic.org/diseases-conditions/viral-hemorrhagic-fevers/symptoms-causes/syc-20351260?utm_source=Google&utm_medium=abstract&utm_content=Viral-hemorrhagic-fever&utm_campaign=Knowledge-panel ]