Patient Zero

Patient Zero is a unique spore carrier found in the Big MT X-22 Botanical Garden in Fallout: New Vegas add-on Old World Blues

Background
Found at in X-22 botanical garden, at the origin of the creatures. That "person" was an unsuccessful experiment because the patient died one day after being exposed to the virus. When the scientists returned to the laboratory the body had disappeared.

Biology

 * It is a variant of the spore carrier

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