Lou further notes that depression is the most common form of mental illness. Depression has not only become a major cause of suicide in Taiwan. The World Health Organization's latest report warns that depression will become one of the 21st century's three greatest diseases.
憂鬱症不但已成為台灣自殺率最高的殺手，世界衛生組織的最新報告也預言，憂鬱症將成為二十一世紀三大流行疾病之一。