Original ResearchPublished 22 July 2026Is fatigue associated with adolescents’ mental health? A pre- vs. post-COVID-19 cross-sectional survey comparisonAnne Abio · Andre Sourander · Omid Dadras · Susanna Hinkka-Yli-Salomäki · Sonja Gilbert · Olli RuuskanenFrontiers in Child and Adolescent Psychiatrydoi 10.3389/frcha.2026.1745757