From: CIS

Rogue transport ships have left Anhur ferrying Humanist rebels. Normally the Humanists would not condescend to travelling in such vessels, but these Humanists are different. Some of them are infected with a terminal disease that is extremely contagious. These transports must be prevented from reaching populated areas. Single out and terminate any ships carrying these infected Humanists.
The humanists know of our intentions and will be prepared to defend themselves.