Though schizophrenia has been around for a long time, it wasn’t until the past century that treatment became available for people living with this debilitating mental health disorder. Today, schizophrenia affects roughly 24 million people in the world, according to the World Health Organization. Researchers are working to better understand what causes the disorder and how best to treat it. Do you know who’s most likely at risk for schizophrenia or how to treat this disorder? Find out by taking this quiz.