Crimean Congo haemorrhagic fever (CCHF) is a tick-borne viral disease with symptoms such as high fever, muscle pain, dizziness, abnormal sensitivity to light, abdominal pain and vomiting. Later on, sharp mood swings may occur, and the patient may become confused and aggressive.

CCHF virus is widespread and evidence for the virus has been found among ticks in Africa, Asia, the Middle East and Eastern Europe and South Western Europe.

In Europe cases of human infections have been reported from Albania, Armenia, Bulgaria, Kazakhstan, Kosovo, Russia, Serbia, Tajikistan, Turkey, Turkmenistan, Ukraine, and Uzbekistan. In June 2008, a first case was diagnosed in Greece.