A person with serious mental illness (SMI) lives in a "parallel universe" separate from "normals" (the name used to describe people who have no mental illness). What causes this condition?

Answer:Poor quality of life because of SMI

Explanation: Serious mental illness is a used to describe a major functional impairments or disorders which can either have mental, behavioral or emotional link. This type of disorder substantially affects a person's Physical activities. Poor quality of life can be a major cause of this Serious mental Disorder, like the excess in take of Hard Drugs and other psychoactive substances or psychostimulants which are capable of influencing the overall body.