MDD stands for Major Depressive Disorder, which refers to a mental health condition characterized by persistent feelings of sadness, loss of interest, and a range of emotional and physical problems. In the context of healthcare jobs, 'MDD' typically refers to professionals who diagnose, treat, and manage Major Depressive Disorder, such as psychiatrists, psychologists, or mental health counselors. These professionals work to help patients improve their mental well-being through therapy, medication, or a combination of both. The role involves assessing symptoms, developing treatment plans, and providing ongoing support to individuals affected by depression.