Controlled. Like most medical problems (bp, diabetes, etc) it can be controlled rather than cured.
Treatable. Major depressive episodes are one of the more common mood disorders, with estimates that 1 in 10 people may suffer an episode in their lifetime. In most cases it is very treatable, with medication, psychotherapy or most effectively with a combination of both. People who have many recurrences may require longer term pharmacotherapy to prevent relapses, but most episodes remit within 3 to 6 months.