This book offers an interdisciplinary view of the relationship between COVID-19 and psychological disorders in varying populations.During and after the pandemic, there was a sharp increase in mental distress and subsequent diagnoses of mental disorders. This book explores the impact of COVID-19 on psychological disorders, including the impact on children, adolescents, and adults, the impact on key workers and the healthcare sector, and the impact alongside other risk factors and comorbidities. The global editors and contributors provide insights into lessons learned and interventions moving forward.This is an ideal resource for clinicians, researchers, and students looking to evaluate mental health assessment and treatment guided by real-life experiences.