The main objective of this study is to determine the mental health status of adolescents living in Klang Valley PPRs during the COVID-19 pandemic and explore its contributing factors. There are two specific objectives: 1. To determine the prevalence of psychological distress among adolescents living in the PPR during the COVID-19 pandemic 2. To explore the source of psychological distress, coping strategies and their help-seeking behaviour in dealing with psychological distress among adolescents living in the PPR during the COVID-19 pandemic. The study utilized a mixed-methods design, consisting of a cross-sectional quantitative study followed by a qualitative approach. The quantitative approach was used to answer research Objective 1 using self-administered screening forms distributed to the participants. The qualitative approach was used to answer research Objective 2 using in-depth interviews (IDI).