Which option is an example of secondary prevention?

• A. Vaccination
• B. Mammography
• C. Rehabilitation after stroke
• D. Health education

Answer: (B)

Secondary prevention focuses on catching disease early through screening so that progression can be slowed or mortality reduced. Mammography fits this role because it is a screening test used to detect breast cancer in people who do not yet have symptoms, allowing treatment to begin at a stage when the disease is more treatable.

Vaccination prevents the disease from occurring in the first place, which is why it’s considered primary prevention. Rehabilitation after a stroke aims to reduce disability and complications once disease has already occurred, placing it in tertiary prevention. Health education helps modify risk factors and prevent disease onset, so it’s also a form of primary prevention.

So mammography is the clear example of secondary prevention.