公衆衛生英語：必須語彙とフレーズ

"incidence rate"

The number of new cases of a disease arising in a defined population over a specified time period, expressed as cases per unit of population per unit of time

"The incidence rate of tuberculosis in the region fell to 12 cases per 100,000 person-years following the expansion of the directly observed therapy programme."

"prevalence"

The proportion of a population that has a particular condition at a given point in time or over a defined period, reflecting both new and pre-existing cases

"Point prevalence surveys revealed that 28% of adults in the district were living with hypertension, the majority undiagnosed and untreated."

"case fatality rate"

The proportion of individuals diagnosed with a specific disease who die from that disease within a defined time period, used to measure disease severity

"During the early phase of the outbreak, the case fatality rate reached 4.2%, prompting the WHO to classify the pathogen as a high-priority public health threat."

"attack rate"

The proportion of people exposed to a disease-causing agent who actually develop the disease during an outbreak or epidemic, often used in foodborne illness investigations

"The attack rate among guests who consumed the chicken salad at the banquet was 68%, strongly implicating it as the vehicle of transmission."

"cohort study"

An observational study design that follows a group of people with a shared exposure or characteristic over time to identify outcomes and measure relative risks

"The prospective cohort study tracked 10,000 workers exposed to asbestos for 25 years to estimate the relative risk of developing mesothelioma."

"confounding variable"

A factor that is independently associated with both the exposure and the outcome of interest, potentially distorting the observed relationship between them

"Socioeconomic status was identified as a confounding variable in the analysis of the link between fast food consumption and cardiovascular disease."

"relative risk"

A ratio that compares the probability of an outcome occurring in an exposed group to the probability of the same outcome in an unexposed group

"Smokers had a relative risk of 15.4 for developing lung cancer compared with non-smokers, according to the meta-analysis of prospective studies."

"attributable fraction"

The proportion of cases of a disease in an exposed population that can be attributed to the exposure, assuming a causal relationship

"Researchers calculated that the attributable fraction for hypertension due to high sodium intake was 32%, indicating the potential impact of dietary salt reduction."

"notifiable disease"

A condition that healthcare providers and laboratories are legally required to report to public health authorities so that data can be compiled and appropriate action taken

"Cholera is a notifiable disease in most countries; clinicians must report confirmed cases to the national health department within 24 hours of diagnosis."

"sentinel surveillance"

A surveillance system that collects data from a pre-selected group of sites or providers designed to be representative of the broader population, used to detect trends cost-effectively

"The national influenza sentinel surveillance network, comprising 350 general practices, reported a sharp rise in influenza-like illness in the second week of January."

"syndromic surveillance"

The real-time collection and analysis of health-related data — such as pharmacy sales, emergency department visits, and school absences — to detect anomalies that may signal an emerging outbreak

"Syndromic surveillance algorithms flagged an unusual cluster of gastrointestinal presentations in the eastern counties three days before the foodborne outbreak was officially confirmed."

"contact tracing"

The process of identifying and monitoring people who have been exposed to an infected individual to prevent further transmission of a communicable disease

"The public health team deployed 120 contact tracers to conduct rapid contact tracing after the measles case was identified at the secondary school."

"index case"

The first documented case in a disease cluster or outbreak that brings the condition to the attention of public health authorities and from which subsequent cases are linked

"Epidemiologists traced the index case of the hepatitis A cluster to a food handler at a city-centre restaurant who had been working while symptomatic."

"epidemiological curve"

A histogram that displays the onset of cases over time during an outbreak, used to determine the pattern of transmission and the likely source of infection

"The pointed peak of the epidemiological curve, with all cases clustering within a 48-hour window, was consistent with a point-source exposure at the catered event."

"seroprevalence"

The proportion of a population that tests positive for specific antibodies in blood serum, used to estimate the extent of past infection or vaccination coverage

"A seroprevalence study conducted six months after the hepatitis E outbreak found that 14% of residents in the affected district had evidence of prior infection."

"passive surveillance"

A surveillance method in which health authorities wait to receive disease reports from clinicians, laboratories, and other healthcare providers without actively seeking out cases

"Under the passive surveillance system, reporting rates for dengue fever were thought to be significantly lower than true case counts due to under-diagnosis in rural areas."

"herd immunity threshold"

The proportion of a population that must be immune to an infectious disease — through vaccination or prior infection — to prevent sustained transmission within the community

"For measles, the herd immunity threshold is approximately 95%, meaning vaccination coverage must reach that level to protect unimmunised individuals."

"vaccine efficacy"

The percentage reduction in disease incidence in a vaccinated group compared with an unvaccinated control group under ideal conditions, typically measured in randomised controlled trials

"The phase III trial reported a vaccine efficacy of 94.1%, meaning vaccinated participants were 94.1% less likely to develop symptomatic disease than those in the placebo group."

"cold chain"

The system of refrigerated transport and storage that maintains vaccines within a required temperature range from the point of manufacture to the point of administration

"Investigators identified a breakdown in the cold chain as the cause of reduced vaccine potency, after storage temperatures at the district health facility exceeded 8°C."

"primary prevention"

Interventions aimed at preventing disease or injury before it occurs by reducing exposures and risk factors in a healthy population

"Fluoridation of the public water supply is a classic example of primary prevention, reducing the incidence of dental caries across the entire population."

"booster dose"

An additional dose of a vaccine given after the initial series to maintain or strengthen the immune response over time

"Health authorities recommended a booster dose of the pertussis vaccine for adults over 65, as immunity acquired from childhood vaccination wanes after a decade."

"vaccine-preventable disease"

An infectious disease for which an effective vaccine exists that can reduce its incidence, severity, or mortality in a population

"The global resurgence of measles, a vaccine-preventable disease, was attributed to declining vaccination coverage driven by misinformation about vaccine safety."

"routine immunisation schedule"

A nationally or internationally recommended timetable specifying which vaccines should be given, at what ages, and in how many doses, to achieve optimal population immunity

"Integrating the HPV vaccine into the routine immunisation schedule for adolescents aged 9 to 14 was projected to reduce cervical cancer incidence by over 70%."

"adverse event following immunisation"

Any untoward medical occurrence after the administration of a vaccine that may or may not be causally related to the vaccination

"The national surveillance system for adverse events following immunisation recorded 42 serious reactions per million doses of the new meningococcal conjugate vaccine."

"health literacy"

The ability of individuals to obtain, process, and understand basic health information and services in order to make informed decisions about their health

"Low health literacy was identified as a barrier to uptake of colorectal cancer screening in older adults, necessitating the development of plain-language patient materials."

"social determinants of health"

The non-medical conditions in which people are born, grow, live, work, and age — including income, education, housing, and social support — that profoundly influence health outcomes

"The health equity report highlighted that differences in life expectancy of up to 12 years between neighbourhoods were largely explained by social determinants of health rather than healthcare access."

"behaviour change intervention"

A structured programme or strategy designed to modify specific health-related behaviours — such as smoking, physical inactivity, or unhealthy eating — in individuals or populations

"The community pharmacy-based behaviour change intervention combining brief advice and motivational interviewing achieved a 22% smoking cessation rate at six-month follow-up."

"health equity"

The principle that everyone should have a fair opportunity to attain their full health potential, with a focus on reducing avoidable differences in health between socially defined groups

"The national health strategy placed health equity at its centre, committing to halve the gap in healthy life expectancy between the most and least deprived areas within a decade."

"community empowerment"

A process by which individuals and communities gain control over the factors that affect their health and wellbeing through participation, capacity building, and collective action

"The maternal health programme used community empowerment principles, training local women as peer health educators to improve antenatal care attendance in remote villages."

"settings-based approach"

A health promotion strategy that targets the environments in which people live, work, learn, and play — such as schools, workplaces, and hospitals — to create conditions supportive of health

"The city adopted a settings-based approach by designating all municipal buildings as smoke-free zones and installing water fountains throughout public parks."

"salutogenic framework"

A theoretical orientation in health promotion, developed by Aaron Antonovsky, that focuses on the origins of health and wellbeing rather than on the causes of disease

"The mental health programme drew on the salutogenic framework, measuring participants' sense of coherence as an indicator of resilience rather than focusing solely on symptom reduction."

"upstream intervention"

A public health strategy that addresses the root social, economic, and environmental causes of poor health rather than treating disease after it occurs

"Economists argued that investing in early childhood education was the most cost-effective upstream intervention to reduce adult chronic disease burden in deprived communities."

"universal health coverage"

A health system goal in which all people receive the health services they need without suffering financial hardship, encompassing quality essential services from promotion to palliation

"The government's commitment to achieving universal health coverage by 2030 required a tripling of the health budget and radical reform of primary care delivery."

"health systems strengthening"

Efforts to improve the six core components of a health system — service delivery, workforce, information, medicines, financing, and governance — to achieve better health outcomes

"The bilateral aid programme focused on health systems strengthening rather than vertical disease programmes, investing in laboratory capacity and health worker training."

"pandemic preparedness"

The capacity of public health systems, governments, and communities to prevent, detect, respond to, and recover from a pandemic event before it occurs

"The simulation exercise revealed critical gaps in pandemic preparedness, including insufficient personal protective equipment stockpiles and no cross-border rapid response protocol."

"International Health Regulations"

A legally binding international instrument agreed by WHO member states that defines their rights and obligations to report and respond to acute public health events of international concern

"Under the International Health Regulations, the country was obligated to notify the WHO within 24 hours after confirming a cluster of haemorrhagic fever cases near its northern border."

"disease burden"

The impact of a health problem on a defined population, measured through indicators such as mortality, morbidity, disability-adjusted life years, and economic costs

"Tobacco-attributable disease burden accounted for 12% of all disability-adjusted life years lost globally, making it the single largest preventable cause of death and disability."

"public health emergency of international concern"

A formal declaration by the WHO Director-General that an extraordinary event poses a public health risk to other states through the international spread of disease, requiring a coordinated international response

"The WHO Director-General declared a public health emergency of international concern on 30 January, activating emergency powers and mobilising global resources to contain the outbreak."

"health diplomacy"

The use of health issues and health expertise as instruments of foreign policy and international cooperation to build relationships and advance diplomatic goals

"Cuba's deployment of medical brigades to disaster-affected countries has been widely analysed as a form of health diplomacy to build geopolitical influence."

"disability-adjusted life year"

A measure of overall disease burden that combines years of life lost due to premature mortality and years lived with disability, allowing comparison of the impact of different diseases

"Depressive disorders ranked as the third leading cause of disability-adjusted life years lost globally among people aged 15 to 44, highlighting the enormous burden of mental illness."

"exposure assessment"

The process of measuring or estimating the intensity, frequency, and duration of human contact with a hazardous agent in the environment or workplace

"Detailed exposure assessment using personal air samplers revealed that silica dust concentrations in the tunnelling operations exceeded occupational exposure limits by a factor of three."

"dose-response relationship"

A quantitative relationship between the amount of a hazardous agent to which an organism is exposed and the magnitude of the biological effect produced

"The dose-response relationship between radon concentration and lung cancer risk was linear, supporting the hypothesis that there is no safe threshold for exposure."

"environmental health impact assessment"

A systematic evaluation of the potential health effects of a proposed development, policy, or environmental change on a defined population

"A mandatory environmental health impact assessment was completed before planning permission was granted for the new waste incineration facility near the residential area."

"occupational exposure limit"

A regulatory standard specifying the maximum concentration of a hazardous substance in workplace air to which workers may be exposed over a defined time period without adverse effects

"The new occupational exposure limit for respirable crystalline silica was set at 0.05 mg/m³ as an eight-hour time-weighted average, halving the previous allowable level."

"health impact assessment"

A systematic process that uses a combination of evidence, methods, and tools to assess the potential health effects of a policy, programme, or project on a population and recommends actions to maximise health benefits

"A health impact assessment of the proposed urban motorway expansion predicted a net increase in respiratory hospital admissions due to elevated nitrogen dioxide concentrations along the route."

"biomonitoring"

The measurement of chemicals or their metabolites in human tissues or fluids — such as blood, urine, or hair — to assess actual body burden of environmental exposures

"Urinary biomonitoring of a cohort of agricultural workers confirmed that organophosphate pesticide metabolites were detectable in 78% of participants during the spraying season."

"climate-sensitive disease"

An infectious or non-infectious condition whose incidence, geographic range, or seasonal pattern is significantly influenced by climate variability and long-term climate change

"Dengue fever is a climate-sensitive disease; rising temperatures and altered rainfall patterns have expanded the geographic range of its Aedes mosquito vector into previously unaffected temperate regions."

"Healthy Cities initiative"

A WHO programme that works with urban governments to place health high on the political agenda and build a strong movement for public health at the local level through policy, governance, and environmental change

"The municipality joined the Healthy Cities initiative and committed to developing a comprehensive health profile, a city health development plan, and annual progress reporting."