Which of the following is an example of a public health intervention?

Setting up vaccination clinics is a clear example of a public health intervention because it directly aims to prevent disease outbreaks and improve population health through immunization. Vaccination clinics help ensure that individuals have access to vaccinations that protect against infectious diseases, contributing to herd immunity and overall community health.

Effective public health interventions are typically those that have widespread impacts on a population's health by addressing specific health risks. Vaccination programs reduce the spread of preventable diseases, thus they are a cornerstone of public health efforts.

While providing health insurance, creating fitness programs, and implementing dietary guidelines are certainly important aspects of health promotion and can influence health outcomes, they operate in slightly different contexts. Health insurance primarily ensures access to medical care rather than directly intervening in public health issues. Fitness programs and dietary guidelines offer recommendations and resources for healthy living but may not have the immediate and direct preventative impact that vaccination clinics provide in controlling infectious diseases.