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Omsk hemorrhagic fever is a viral hemorrhagic fever caused by a Flavivirus.It is found in Siberia. It is named for an outbreak in Omsk.

There are a number of symptoms of the virus. In the first 1–8 days the first phase begins. The symptoms in this phase are:

pain in the lower and upper extremities and severe prostration

a rash on the soft palate

swollen glands in the neck

appearance of blood in the eyes (conjunctival suffusion)

gastrointestinal symptoms (symptoms relating t