What type of prevention does a nurse's presentation about preventing sexually transmitted infections represent?

The nurse's presentation about preventing sexually transmitted infections exemplifies primary prevention because it focuses on strategies aimed at preventing the onset of disease before it occurs. Primary prevention entails actions that reduce risk factors and promote health, such as education about safe sexual practices, condom use, and regular screening for infections.

By providing information and resources to the community, the nurse empowers individuals to take proactive measures, thus decreasing the incidence of sexually transmitted infections. This proactive approach is foundational to public health, aiming to protect individuals and communities from health issues before they manifest.

In contrast, secondary prevention involves early detection and prompt treatment of diseases, while tertiary prevention focuses on managing and reducing the impact of an already diagnosed condition. Lastly, quaternary prevention addresses the prevention of over-medicalization and the potential harm of unnecessary medical interventions. These distinctions clarify why the presentation falls under primary prevention rather than the other categories.