Ticks themselves do not cause disease but if a tick is infected with a virus or bacterium, then that pathogen can be transmitted through the tick’s bite and cause disease in humans.
On 31 August 2016 the autonomous Community of Madrid, Spain, reported two cases of infection with Crimean–Congo haemorrhagic fever (CCHF) virus. This document assesses the risk associated with the occurrence of two cases of Crimean–Congo haemorrhagic fever in Spain.