Psychological trauma has developed into a very common concept in the scientific community, in mental health care, as well as in popular language and mass media. The purpose of this article is to show the relevance of the discipline of traumatic stress studies to the field of public mental health by examining central concepts and findings concerning trauma and its aftermath and examining implications for public mental health.

Background: Different user groups regard systematic reviews as reliable and valuable sources for answering research questions. For systematic reviews to fulfill their purpose, methodological quality in all stages are of importance. The studies identified in a systematic search form the basis of the review, thus the search process methodology is important for both performing and reporting the search. The purpose of the present study was to evaluate the quality of non-Cochrane systematic reviews by analyzing how they perform and report the search.

Objective: Exposure to potentially traumatic events (PTEs) has been identified as a risk factor for various psychological problems in adolescents generally and in young refugees. The aim of this study was to examine whether individual resilience (assessed as a personality characteristic) can protect adolescents in diverse contexts from negative effects of trauma exposure.

Traumatic loss involves the loss of loved ones in the context of potentially traumatizing circumstances and is a commonly reported traumatic event. It may give rise to disturbed grief, called prolonged grief disorder (PGD) in ICD-11 and persistent complex bereavement disorder (PCBD) in DMS-5, combined with posttraumatic stress disorder (PTSD) and depression. The recent inclusion of grief disorders in both DSM-5 and ICD-11 have spurred research on grief-related psychopathology. This special issue on traumatic loss includes 10 articles and two letters.