I'm currently trying to flesh out a character on a PbP game and was wondering if there's ever any mention of diseases throughout the Calixis Sector. I'm looking for a disease where if one were to catch it the chance of survival is low even with 40k technology/psyker healing. I'm not looking for anything that would cause a hive wide pandemic.
My character is a son of a cleric whose family died of a disease that he was spared getting. Seeing this as a sign of the god emperor he has joined the ecclisiarchy to find his true calling. Any help or suggestions are appreciated.