The pandemic has produced a dramatic new wave of loneliness for those coping with loss, grief, and social isolation. Although the feeling of loneliness is not a medical condition, it can easily transition into the clinical disorders of depression and anxiety. Dr. Richard Friedman, Professor of Clinical Psychiatry at Weill Cornell Medicine, explains how the upheaval of prolonged loneliness can affect the brain and heart, and how loneliness can be more quickly remedied than one would think.