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Aminur Rahman, Amy E. Peden, Lamisa Ashraf, Daniel Ryan, Al-Amin Bhuiyan, and Stephen Beerman

Drowning has been described as a major global public health problem and has recently been acknowledged by a United Nations Declaration on Global Drowning Prevention. While drowning impacts countries of all income levels, the burden is overwhelmingly borne by low- and middle-income countries (LMICs) who account for 90% of the global death toll. In addition, there is scarce data collection on drowning in LMICs, so the magnitude of drowning may be far greater than is represented. A range of factors including sex, age, education, income, access to water, a lack of swimming skills, certain occupations like commercial fishing, geographically isolated and flood-prone locations, preexisting medical conditions, and unsafe water transport systems, influence the risk of drowning. Some behavioral factors, such as alcohol or drug consumption, not wearing life jackets, and engaging in risky behaviors such as swimming or boating alone, increase drowning risk. Geopolitical factors such as migration and armed conflict can also impact drowning risk. There is a growing body of evidence on drowning prevention strategies. These include pre-event interventions such as pool fencing, enhancing community education and awareness, providing swimming lessons, use of lifejackets, close supervision of children by adults, and boating regulations. Interventions to reduce harm from drowning include appropriate training for recognition of a drowning event, rescue, and resuscitation. An active and/or passive surveillance system for drowning, focusing on individual settings and targeting populations at risk, is required. Drowning requires coordinated multisectoral action to provide effective prevention, rescue, and treatment. Therefore, all countries should aim to develop a national water safety plan, as recommended in the WHO Global Report on Drowning. Further research is required on the epidemiology and treatment of drowning in LMICs as well as non-fatal and intentional drowning in both high-income countries (HICs) and LMICs. Effective and context-specific implementation of drowning prevention strategies, including pilot testing, scale up and evaluation, are likely to help reduce the burden of both fatal and non-fatal drowning in all countries.


Luiz Augusto Cassanha Galvao, Volney Câmara, and Daniel Buss

The relationship between environment and health is part of the history of medicine and has always been important to any study of human health and to public-health interventions. In Latin America many health improvements are related to environmental interventions, such as the provision of better water and sanitation services. Latin America’s development, industrialization, and sweeping urbanization have brought many improvements to the well-being of its populations; they have also inaugurated new societies, with new patterns of consumption. The region’s basic environmental-health interventions have needed to be updated and upgraded to include disciplines such as toxicology, environmental epidemiology, environmental engineering, and many others. Multidisciplinary and inter-sector approaches are paramount to understanding new profiles of health and well-being, and to promoting effective public-health interventions. The new social, economic, labor, and consumption aspects of modern Latin American society have become more and more relevant to understanding the complex interactions in the region’s social, biological, and physical environment, which are essential to explaining some of the emerging and re-emerging public-health problems. Environmental health, as concept and as intervention, is simple and easily understood, but no longer sufficient to achieve the levels of health and well-being expected and required by these new realities. Many global changes such as climate change, biodiversity loss, and mass migrations has been identified as main cause of ill health and are at the center of the sustainable development challenges in general, and many are critical and specific public health. To face this development, other frameworks have emerged, such as planetary health and environmental and social determinants of health. Public health remains central to some, such as the improved environmental-health agenda, while others assign public health a relative position in a variety of overarching frameworks.


Danuta Wasserman

Around 700,000 people take their lives each year worldwide. Suicide accounts for approximately 1.3% of all deaths and therefore represents a major public health problem. The global age-standardized suicide rate is 9 per 100,000 population, yet there are large variations among genders, ages, countries, and world regions. The stress–vulnerability model of suicidal behaviors has been proposed to explain how a diathesis, developed through the influence of genetic and neurodevelopmental factors in relation to perinatal, postnatal, and life experiences, interacts with different risk and protective factors that either decrease or enhance the individual’s level of resilience to stress and suicidal risk. Public health suicide prevention strategies include suicide means restriction, reducing harmful substance use, promoting responsible media reporting, public-awareness campaigns, gatekeeper trainings, school-based interventions, crisis helplines, and postvention. Mental health strategies comprise identification, treatment, and rehabilitation of persons in distress and at risk for suicide. Multicomponent strategies that use a combination of evidence-based methods from public and mental health sectors are recommended. Future work should aim at enhancing the quality of epidemiological data, improving the research on protective and ideation-to-action factors, expanding the quantity and quality of data coming from low- and middle-income countries, and evaluating the cost-effectiveness of different suicide prevention strategies.