Since the late 1970s, the federal Healthy People Initiative has been a visible component of the United States’ approach to improving population health.[6][7] In each decade, a new version of Healthy People is issued,[8] featuring updated goals and identifying topic areas and quantifiable objectives for health improvement during the succeeding ten years, with assessment at that point of progress or lack thereof. Progress has been limited to many objectives, leading to concerns about the effectiveness of Healthy People in shaping outcomes in the context of a decentralized and uncoordinated US health system. Healthy People 2020 gives more prominence to health promotion and preventive approaches and adds a substantive focus on the importance of addressing social determinants of health. A new expanded digital interface facilitates use and dissemination rather than bulky printed books as produced in the past. The impact of these changes to Healthy People will be determined in the coming years.[9]
L'objectif du concept One Health, illustré par ces différents travaux en cours au sein de l'Inrae, est simple : “produire des connaissances et éclairer dans leur prise de décisions l'ensemble des acteurs concernés par ces enjeux de santé publique”.  A l'automne prochain, l'Institut fera un nouveau point, cette fois-ci concentré sur les substances toxiques se retrouvant dans notre chaîne alimentaire.
Public health has been described as "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals."[48] It is concerned with threats to the overall health of a community based on population health analysis. The population in question can be as small as a handful of people or as large as all the inhabitants of several continents (for instance, in the case of a pandemic). Public health has many sub-fields, but typically includes the interdisciplinary categories of epidemiology, biostatistics and health services. Environmental health, community health, behavioral health, and occupational health are also important areas of public health.

Public health also takes various actions to limit the health disparities between different areas of the country and, in some cases, the continent or world. One issue is the access of individuals and communities to health care in terms of financial, geographical or socio-cultural constraints.[50] Applications of the public health system include the areas of maternal and child health, health services administration, emergency response, and prevention and control of infectious and chronic diseases.
Section 1331 of the Affordable Care Act gives states the option of creating a Basic Health Program (BHP), a health benefits coverage program for low-income residents who would otherwise be eligible to purchase coverage through the Health Insurance Marketplace. The Basic Health Program gives states the ability to provide more affordable coverage for these low-income residents and improve continuity of care for people whose income fluctuates above and below Medicaid and Children's Health Insurance Program (CHIP) levels.
Personal health depends partially on the active, passive, and assisted cues people observe and adopt about their own health. These include personal actions for preventing or minimizing the effects of a disease, usually a chronic condition, through integrative care. They also include personal hygiene practices to prevent infection and illness, such as bathing and washing hands with soap; brushing and flossing teeth; storing, preparing and handling food safely; and many others. The information gleaned from personal observations of daily living – such as about sleep patterns, exercise behavior, nutritional intake and environmental features – may be used to inform personal decisions and actions (e.g., "I feel tired in the morning so I am going to try sleeping on a different pillow"), as well as clinical decisions and treatment plans (e.g., a patient who notices his or her shoes are tighter than usual may be having exacerbation of left-sided heart failure, and may require diuretic medication to reduce fluid overload).[53]
Genetics, or inherited traits from parents, also play a role in determining the health status of individuals and populations. This can encompass both the predisposition to certain diseases and health conditions, as well as the habits and behaviors individuals develop through the lifestyle of their families. For example, genetics may play a role in the manner in which people cope with stress, either mental, emotional or physical. For example, obesity is a significant problem in the United States that contributes to bad mental health and causes stress in the lives of great numbers of people.[27] (One difficulty is the issue raised by the debate over the relative strengths of genetics and other factors; interactions between genetics and environment may be of particular importance.)
Many governments view occupational health as a social challenge and have formed public organizations to ensure the health and safety of workers. Examples of these include the British Health and Safety Executive and in the United States, the National Institute for Occupational Safety and Health, which conducts research on occupational health and safety, and the Occupational Safety and Health Administration, which handles regulation and policy relating to worker safety and health.[59][60][61]

“Le mouvement One Health (“une seule santé”), initié au début des années 2000, fait suite à la recrudescence et à l'émergence de maladies infectieuses, en raison notamment de la mondialisation des échanges. Le principe [de One Health] est simple : la protection de la santé de l'Homme passe par la santé de l'animal et celle de l'ensemble des écosystèmes”, peut-on lire sur le site de l'Inrae. Alors que nous traversons une période de pandémie mondiale, comme l'explique Philippe Mauguin, PDG de l'Inrae, il est important de rappeler que 60 % des maladies infectieuses humaines proviennent du monde animal : c'est la zoonose. De plus, 70 % de ces maladies nous sont transmises par les animaux sauvages. L'objectif de cet Institut qui a vu le jour en janvier 2020, au travers de One Health, est de démontrer le lien entre la dégradation de la biodiversité et l'émergence de ces nouvelles zoonoses. Pour cela, plusieurs départements et unités de recherche de l'Inrae consacrent leurs études aux facteurs de dégradation et des pressions imposées sur l'ensemble des écosystèmes. “La problématique des conséquences directes et indirectes de différents facteurs de l'environnement sur les santés [...] est un sujet de préoccupation pour l'Inrae”, explique Thierry Caquet, Directeur Scientifique-Environnement de l'Institut.
Le département de Santé Animale de l'Institut, dirigé par Muriel Vayssier-Taussat, étudie les interactions entre la santé animale et humaine. “Pour préserver la santé de l'Homme, une des voies est de préserver la santé animale” explique-t-elle. Mais cette protection ne doit pas être menée n'importe comment. Ces dernières années, il a été observé que la résistance aux antibiotiques avait largement augmenté chez de nombreux animaux dû à un usage massif. Ceci contribue à l'apparition de nouveaux virus plus résistants et donc potentiellement plus facilement transmissibles à l'Homme. L'unité Génétique Animale et Biologie Intégrative, dirigée par Claire Rogel-Gaillard, se consacre à l'étude de la diversité génomique en élevage, et son lien avec les santés : “Comment sélectionner des animaux qui vont être en bonne santé [...] tout en limitant l'usage d'anti-infectieux et en réduisant l'empreinte environnementale ? Il y a en fait un lien assez fort entre la durabilité des systèmes d'élevage et la santé des Hommes et animaux de la Terre.” A l'aide de travaux sur la variabilité individuelle des réponses immunitaires (aux maladies et aux vaccins) sur les animaux d'élevage, Mme Rogel-Gaillard explique qu'il “n'existe pas d'animal complètement optimal dans toutes les conditions et dans tous les environnements [...]. Une génétique optimale dans un environnement peut ne pas être optimale dans un autre.” 
Systematic activities to prevent or cure health problems and promote good health in humans are undertaken by health care providers. Applications with regard to animal health are covered by the veterinary sciences. The term "healthy" is also widely used in the context of many types of non-living organizations and their impacts for the benefit of humans, such as in the sense of healthy communities, healthy cities or healthy environments. In addition to health care interventions and a person's surroundings, a number of other factors are known to influence the health status of individuals, including their background, lifestyle, and economic, social conditions and spirituality; these are referred to as "determinants of health." Studies have shown that high levels of stress can affect human health.[10]
Visit your doctor if you have any health concerns. If you have any issues that are making you feel like you need to do a detox, then you might have an underlying health issue. If this is the case, it’s much better to handle that health issue with professional medical help. Don’t hesitate to visit your doctor for an exam if you think something might be wrong. This is the best choice to protect your health.[12]