This population-based cohort study in Seoul, South Korea investigated psychiatric adverse events (AEs) following COVID-19 vaccination. The study found that COVID-19 vaccination increased the risks of depression, anxiety, dissociative, stress-related, and somatoform disorders, and sleep disorders, while reducing the risk of schizophrenia and bipolar disorder. The cumulative incidences of several psychiatric disorders were higher in the vaccinated group at three months post-vaccination. Special caution is advised when vaccinating populations vulnerable to psychiatric AEs.

Hong Jin Kim, Min-Ho Kim, Myeong Geun Choi, Eun Mi Chun