it is sometimes caused by head trauma,
A number of reasons. Genetics is part of it. I have a friend who's schizophrenic and so is his dad, but they've got it under control. Like the person above posted trauma can cause it, but not just physical trauma, emotional trauma too. I know another guy who got it after a period of homelessness.
A person with catatonic schizophrenia is most affected in bodily movements. Sometimes can lead to catatonic stupor or catatonic excitement.
If you are talking about auditory hallucinations, most people with schizophrenia hallucinate voices commenting on their actions.
Most people do not believe that people with schizophrenia are possessed. Even if the general attitude towards schizophrenia is more negative than it should be, possession is not a common belief about schizophrenia.
Cacasian or Asian people.
Yes. Although most people with schizophrenia have other health conditions, especially substance abuse disorder, many only have schizophrenia.
Babies
African Americans
the jewish people.
people accused of crime
native mayan people
Australia
people and/or animals with a risk of getting bit.