. Primary prevention aims to remove or reduce disease risk factors (eg, immunization, giving up or not starting smoking).
Secondary prevention techniques promote early detection of disease or precursor states (eg, routine cervical Papanicolaou screening to detect carcinoma or dysplasia). This involves Screening
Tertiary prevention measures are aimed at limiting the impact of established disease (eg, partial mastectomy combined with radiation therapy to remove and control localized breast cancer).