I have knowledge of a patient that is blood type Rh null, which is extremely rare. Most people (including this person) with this blood type also have a medical condition called paroxysmal nocturnal hemoglobinuria (PNH), which is a very serious form of anemia.
This person uses a medication called Soliris. This medicine is the most expensive medicine that I know of, approximately $15000 per dose (taken by IV infusion weekly). He pays out of pocket, insurance does not cover this medication.
This person is also directly related to the governor and former governor of a major state.
Coincidence?