This article provides an introduction and overview of the current special section devoted to developmental perspectives on trauma exposure and posttraumatic stress reactions. Although there have been many revisions to the posttraumatic stress disorder (PTSD) diagnosis in the four decades that have ensued since its inclusion in our diagnostic systems, and many decades of empirical and clinical work investigating the differential effects of traumatic stress on children and adolescents, a truly developmental perspective is still lacking in the diagnosis.

Background
Previous meta-analyses of psychotherapies for children and adolescents with post-traumatic stress disorder (PTSD) did not investigate whether treatment efficacy is diminished when patients report multiple (versus single) traumas.

Aims
To examine whether efficacy of psychological interventions for paediatric PTSD is diminished when patients report multiple (versus single) traumas.

The objective of the current study was to investigate the grief experiences of people affected by COVID-19. The study adopted a qualitative design of descriptive phenomenology. Fifteen adults who had lost a family member during the COVID-19 pandemic were selected as the sample through the purposive sampling method until theoretical saturation was achieved. Data was collected using semi-structured interviews and the Colaizzi analysis method.

Precise estimates of the impact of famine on infant and child mortality are rare due to lack of representative data. Using vital statistics reports on the Netherlands for 1935–47, we examine the impact of the Dutch famine (November 1944 to May 1945) on age-specific mortality risk and cause of death in four age groups (stillbirths, <1 year, 1–4, 5–14) in the three largest famine-affected cities and the remainder of the country.