Patient Zero

Patient Zero is a unique spore carrier found in the Big MT.

Background
The origin of this creature comes from a human patient that mutated when the B. mordicana fungus, later used in Vault 22, infected them. They were considered a failed experiment by the Big MT scientists, and the body was left alone. However, when the scientists returned to the laboratory, the body of Patient Zero had disappeared and now can be found at the X-22 botanical garden.

Appearances
Patient Zero appears only in the Fallout: New Vegas add-on Old World Blues.

Behind the scenes
The term "Patient Zero" was originally used to describe the individual initially believed responsible for introducing the virus responsible for AIDS to the United States, although the designation was later repudiated. It has since been genericised to refer to the first described instance or "index case" of any medical condition, in which case it is used in decapitalized form.