any action, program, or strategy intentionally designed to improve health outcomes or prevent the onset of a health problem. Health interventions can target individuals, specific groups, or entire populations and may take many forms, including medical, behavioral, educational, policy-based, or environmental measures.
Example
A government launches a health intervention to reduce childhood obesity by introducing school-based nutrition education, providing healthier cafeteria meals, and creating after-school physical activity programs. This multifaceted approach targets both behavior and environment to improve children’s health outcomes.