Schizophrenia affects an estimated one in 100 people – about three million in America alone. One in 20 cases ends in suicide.
But the essential question about the illness – whether it ran in families or emerged fully formed out of nowhere – had consumed therapists, biologists and geneticists for generations.
The precise genetic pattern of schizophrenia had long defied detection. For a century, researchers have understood that one of the biggest risk factors is heritability.
Read more on telegraph.co.uk