An occupational health nurse at a group of health care clinics is planning activities to prevent and control the spread of communicable disease. The nurse should identify that which of the following activities is a secondary level of prevention?

A. Influenza immunizations: Administering vaccines is a primary level of prevention because it aims to prevent the onset of disease before exposure occurs. This activity reduces the risk of infection in healthy individuals. B. Tuberculosis screenings: Screening for tuberculosis is a secondary prevention activity because it involves early detection of disease in asymptomatic individuals. Identifying TB early allows for prompt treatment to prevent progression and transmission. C. Presentations about safer sex practices: Educational programs promoting safer behaviors are primary prevention because they aim to reduce risk factors and prevent disease before it occurs. D. Evaluations of bloodborne pathogen policies: Evaluating workplace policies is a tertiary prevention strategy if it focuses on managing and controlling the impact of existing disease or exposure. It does not directly detect or prevent disease in healthy individuals.