The Shakes

The dreaded Shakes crops up now and again along coastal regions. Victims experience a high fever and uncontrollable shaking fits. In time, the afflicted can no longer control his bodily movements as tremors rock his body, which prevents sleeping, eating, and generally functioning. Those who cannot kill themselves will probably dehydrate if they do not resist this plague.

Source

 * Warhammer Fantasy RPG 2nd ED -- Tome of Corruption (pg. 48).