- hemorrhagic fever, haemorrhagic fever, viral hemorrhagic fever, viral haemorrhagic fever, VHF - a group of illnesses caused by a viral infection (usually restricted to a specific geographic area); fever and gastrointestinal symptoms are followed by capillary hemorrhage
--1 is a kind of viral infection, virus infection
--1 has particulars: - very high frequency, VHF - 30 to 300 megahertz
--2 is a kind of radio frequency
--2 is a part of electromagnetic spectrum