One of my friend is suffering from Schizophrenia. He is 28 years old. He was completely fine one year ago but after the demise of his father in an accident his mental state is such that he is not able to understand reality and illusion. Sometimes he starts hallucinating that somebody wants to kill him. I wish to know about what is schizophrenia? And also what are the different ways to keep a tab on this schizophrenia disease?