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According to Margaret Chan, former Director General of the World Health Organization (WHO), and Ann Veneman, former Executive Director of the United Nations Children’s Fund [1]: Once children reach the age of five years, unintentional injuries are the biggest threat to their survival. According to a recent analysis of annual publication in infant, child and adolescent child injury conducted by Lawrence [7] using the SafetyLit database of citations not listed in Medline [8], he uncovered a total of 55,467 publications from 1966–2017, and 26,648 publications from 1966–1997 compared with Glied’s 187 publications during the same period (1966–1997). According to Dr. Sabastian Van As, who heads the trauma unit at the Red Cross War Memorial Children’s Hospital in Cape Town, South Africa, “The world is a dangerous place for children … even more so in poor countries. According to the 2013 Global Burden of Disease Study [23] road traffic injuries were the leading cause of death among adolescents around the world.

Homeless persons experience high rates of health problems such as Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) and Hepatitis A infections, alcohol and drug addiction, mental illness, tuberculosis, and other serious conditions. The health problems facing homeless persons result from various factors, including a lack of housing, racism and discrimination, barriers to health care, a lack of access to adequate food and protection, limited resources for social services, and an inadequate public health infrastructure. In this Special Issue of the International Journal of Environmental Research and Public Health (IJERPH), we have brought together researchers, practitioners, and community organizers to articulate the public health problem of homelessness and identify clear strategies to reduce homelessness and provide more adequate health care and housing for this population. Based on the resulting associations, their findings stress the importance of implementing interventions aimed at increasing social support for homeless persons, something that may also increase skill development for distress tolerance and indirectly lead to a reduction in depression and PTSD.

Injury prevention plays a key role in keeping children safe, but emerging research suggests that imposing too many restrictions on children’s outdoor risky play hinders their development. We explore the relationship between child development, play, and conceptions of risk taking with the aim of informing child injury prevention. Generational trends indicate children’s diminishing engagement in outdoor play is influenced by parental and societal concerns. We outline the importance of play as a necessary ingredient for healthy child development and review the evidence for arguments supporting the need for outdoor risky play, including: (1) children have a natural propensity towards risky play; and, (2) keeping children safe involves letting them take and manage risks. Literature from many disciplines supports the notion that safety efforts should be balanced with opportunities for child development through outdoor risky play. New avenues for investigation and action are emerging seeking optimal strategies for keeping children “as safe as necessary,” not “as safe as possible.” This paradigm shift represents a potential for epistemological growth as well as cross-disciplinary collaboration to foster optimal child development while preserving children’s safety.

Injuries and violence among young people have a substantial emotional, physical, and economic toll on society. Understanding the epidemiology of this public health problem can guide prevention efforts, help identify and reduce risk factors, and promote protective factors. We examined fatal and nonfatal unintentional injuries, injuries intentionally inflicted by other (i.e., assaults and homicides) among children ages 0–19, and intentionally self-inflicted injuries (i.e., self-harm and suicides) among children ages 10–19. We accessed deaths (1999–2015) and visits to emergency departments (2001–2015) for these age groups through the Centers for Disease Control and Prevention’s (CDC) Web-based Injury Statistics Query and Reporting System (WISQARS), and examined trends and differences by age, sex, race/ethnicity, rural/urban status, and injury mechanism. Almost 13,000 children and adolescents age 0–19 years died in 2015 from injury and violence compared to over 17,000 in 1999. While the overall number of deaths has decreased over time, there were increases in death rates among certain age groups for some categories of unintentional injury and for suicides. The leading causes of injury varied by age group. Our results indicate that efforts to reduce injuries to children and adolescents should consider cause, intent, age, sex, race, and regional factors to assure that prevention resources are directed at those at greatest risk.

Homelessness is now recognized as a significant public health problem in North America and throughout advanced economies of the world. The causes of homelessness are complex but the lack of affordable housing, unemployment, poverty, addiction, and mental illness all contribute to the risk for homelessness. We argue that homelessness is increasingly exacerbated by system-wide infrastructure failures occurring at the municipal, state, and federal government levels and whose catastrophic impacts on population health and the response to the COVID-19 pandemic are the consequence of the decades-long devolution of government and neglect to invest in public infrastructure, including a modern public health system.

Homelessness continues to be a pervasive public health problem throughout Canada. Hospital Emergency Departments (EDs) and inpatient wards have become a source of temporary care and shelter for homeless patients. Upon leaving the hospital, homeless patients are not more equipped than before to find permanent housing. The Bridge Healing program in Edmonton, Alberta, has emerged as a novel approach to addressing homelessness by providing transitional housing for those relying on repeated visits to the ED. This paper describes the three essential components to the Bridge Healing model: partnership between the ED and a Housing First community organization; facility design based on The Eden Alternative™ principles; and grassroots community funding. This paper, in conjunction with the current pilot project of the Bridge Healing facilities, serves as a proof of concept for the model and can inform transitional housing approaches in other communities.

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Emerging evidence shows that homelessness continues to be a chronic public health problem throughout Canada. The Bridge Healing Program has been proposed in Edmonton, Alberta, as a novel approach to combat homelessness by using hospital emergency departments (ED) as a gateway to temporary housing. Building on the ideas of Tiny Villages, the Bridge Healing Program provides residents with immediate temporary housing before transitioning them to permanent homes. This paper aims to understand effective strategies that underlie the Tiny Villages concept by analyzing six case studies and applying the lessons learned to improving the Bridge Healing Program. After looking at six Tiny Villages, we identified four common elements of many successful Tiny Villages. These include a strong community, public support, funding with few restrictions, and affordable housing options post-graduation. The Bridge Healing Program emphasizes such key elements by having a strong team, numerous services, and connections to permanent housing. Furthermore, the Bridge Healing Program is unique in its ability to reduce repeat ED visits, lengths of stay in the ED, and healthcare costs. Overall, the Bridge Healing Program exhibits many traits associated with successful Tiny Villages and has the potential to address a gap in our current healthcare system.

Unless this research culminates in practical and cost-effective interventions capable of attracting the political and social support required to allow effective implementation, it will not prevent harm or save lives. 1 The Public Health Model has been proposed as a framework to promote the progression of sports medicine research towards real-world application. 2 3 In this four-stage model, research progresses in a stepwise manner from problem identification to adoption of effective interventions: 4 Stage 1: establishing the magnitude of the problem; Stage 2: identifying risk factors; Stage 3: developing effective interventions; Stage 4: ensuring widespread adoption and use. Contrary to Mercy et al's 3 advice, some researchers adopted a top-down approach, believing that Stages 1-3 of the Public Health Model are the province of scientific experts, while Stage 4 (dissemination, implementation and adoption) was the domain of community practitioners who were expected to take efficacious interventions and faithfully apply them to improve practice. 21 This science-driven misapplication of the Public Health Model ignores the importance of engaging practitioners, policy makers and the community in the process of designing, researching and implementing effective interventions, falsely assuming that efficacious interventions can be automatically adopted and effectively implemented at a population level. 6 9 16 Researchers who ignore the contextual, implementation and process determinants of intervention success should not be surprised if practitioners and the community are unwilling or unable to adopt evidence-based interventions to prevent sports injury. 6 9 In the intense discourse between researchers and practitioners it is easy to forget a third group of stakeholders-the community.

In the first three decades of life, more individuals in the USA die from injuries and violence than from any other cause. Millions more people survive and are left with physical, emotional, and financial problems. Injuries and violence are not accidents; they are preventable. Prevention has a strong scientific foundation, yet efforts are not fully implemented or integrated into clinical and community settings. In this Series paper, we review the burden of injuries and violence in the USA, note effective interventions, and discuss methods to bring interventions into practice. Alliances between the public health community and medical care organisations, health-care providers, states, and communities can reduce injuries and violence. We encourage partnerships between medical and public health communities to consistently frame injuries and violence as preventable, identify evidence-based interventions, provide scientific information to decision makers, and strengthen the capacity of an integrated health system to prevent injuries and violence.