Which of the following is an example of secondary prevention?

Secondary prevention focuses on early detection and prompt treatment of diseases to prevent progression and improve outcomes. Screening for breast cancer is a quintessential example of secondary prevention because it involves identifying the disease in its early stages when it is asymptomatic, allowing for earlier intervention which can reduce morbidity and mortality associated with breast cancer.

Vaccinating children is considered primary prevention, as it aims to prevent diseases before they occur by strengthening the immune response. Rehabilitation after heart surgery falls under tertiary prevention, which is designed to manage and reduce complications following a disease or injury. Providing health education can span various levels of prevention but is generally associated with primary prevention efforts, promoting healthy behaviors to prevent disease onset. Therefore, screening for breast cancer effectively exemplifies the principles of secondary prevention by aiming to catch the disease early.