The Wayback Machine - https://web.archive.org/web/20190727153949/https://www.who.int/topics/haemorrhagic_fevers_viral/en/

Health topics

Haemorrhagic fevers, Viral

 
Two scientists dissect a bat for samples

Viral haemorrhagic fever is a general term for a severe illness, sometimes associated with bleeding, that may be caused by a number of viruses. The term is usually applied to disease caused by Arenaviridae (Lassa fever, Junin and Machupo), Bunyaviridae (Crimean-Congo haemorrhagic fever, Rift Valley Fever, Hantaan haemorrhagic fevers), Filoviridae (Ebola and Marburg) and Flaviviridae (yellow fever, dengue, Omsk haemorrhagic fever, Kyasanur forest disease).