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Epidemiology studies who gets diseases, where and when they occur, and what factors determine these patterns in a defined population.
Epidemiology is the study and analysis of the distribution (who, when, and where) and patterns of health and disease in a defined population, including the determinants of those conditions. It applies this knowledge to prevent disease by identifying risk factors and targeting preventive healthcare. As a cornerstone of public health, epidemiology supports evidence-based practice and policy decisions by linking observed health patterns to actionable prevention strategies. Public health purpose of epidemiology is to prevent disease through systematic investigation: epidemiologists help design studies, collect and analyze data, interpret findings, and disseminate results (often through peer review and sometimes systematic reviews). The field also develops and refines methods used across clinical research and public health, and it covers major study areas such as disease causation, transmission, outbreak investigation, disease surveillance, environmental and occupational effects, screening, biomonitoring, and comparisons of treatment effects (e.g., clinical trials).
Epidemiology studies who gets diseases, where and when they occur, and what factors determine these patterns in a defined population.
Its public health purpose is disease prevention by identifying risk factors and informing evidence-based policy and preventive healthcare targets.
Epidemiologists conduct and support research through study design, data collection and statistical analysis, and dissemination of results to guide interventions.
The study and analysis of the distribution, patterns, and determinants of health and disease in populations, used to prevent disease.
A core epidemiologic description of how health outcomes vary across people, time, and geographic or other settings.
Factors that explain why health outcomes occur and vary within a population, including exposures and other causal influences.
Ongoing collection, analysis, and interpretation of health data to monitor disease occurrence and guide public health action.
An exposure or characteristic associated with an increased likelihood of developing a disease or health outcome.
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