This article is such a good read. According to this article Schizophrenia in children is not rare as we think. https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=schizophrenia+in+children&oq=schizophrenia+#d=gs_qabs&u=%23p%3D_QjcFJLoUDMJ