A syndrome caused by infection with one of a number of viruses that can cause
increased permeability of the blood vessels resulting in bleeding into the skin,
internally, or from the mouth or other orifices. The bleeding is usually not lifethreatening.
Other signs and symptoms of viral hemorrhagic fever (VHF) may also
include high fever, weakness, dizziness, and myalgia. In severe cases, there may be
shock, coma, delirium, seizures , and death. The viruses that cause VHF belong to four