According to the National Institute of Mental Health, schizophrenia affects about 1.1 percent of the adult American population in a given year. People with schizophrenia sometimes hear voices others don't hear, believe that others are broadcasting their thoughts to the world, or become convinced that others are trying to harm them. These experiences can make them fearful and withdrawn and make it difficult to have relationships with other people.
More information
For more on schizophrenia, visit the U.S. National Institute of Mental Health.
