Diagnosan

Diagnosans are members of a fictional alien race in the Farscape television series.

Due to their natural ability to detect and treat a variety of diseases in all types of living things, many of them become physicians. They have complex minds and an equally complex language, so much so that standard translator microbes cannot decode the intricasies of their speech. They are soft-spoken and gentle, further adding to their abilities as doctors.

Their primary flaw as a species is, ironically, their own inability to tolerate infection in their bodies. Typically, diagnosans wear special masks whenever they are in a situation where they may come into contact with a contagion. Even traces of a disease can prove fatal if inhaled into their nose and mouth.