Red Pox

Almost seven hundred years after the Black Death, the Skaven struck again with equal force and fury, but this time against Bretonnia. Here the disease of choice became known as the Red Pox, for the bloody welts that appeared on the victim’s face and throat. The Pox was slower to kill than the Black Death, making it slightly easier to contain, but greatly extending the suffering of its victims. It first appeared in Bordelaux, then some years later in Brionne, before spreading east along the Brienne river, and south into Tilea. Once again, the Skaven waited until the entire southern region was ravaged by disease and depopulation, then attacked. They sacked Brienne and Miragliano, and lay siege to Quenelles. However, the lords of northern Bretonnia were not slow to retaliate, and with the aid of the elves of Athel Loren, soon drove the Skaven back underground yet again.

Source

 * Warhammer Fantasy RPG 2nd ED -- Children of the Horned Rat 33