''Key Topics'' is a short, easy-to-read text that provides basic information about twelve key topics in public health, such as diabetes, cancer, smoking and teenage pregnancy, and how prevention and health promotion should be tackled at community and one-to-one levels. The twelve topics are the 'must-dos' of public health action. They have been selected because they are those addressed in current national public health strategies such as Saving Lives: our healthier nation, and comparable strategies in Scotland, Wales and Northern Ireland. Many are the subject of National Service Frameworks and other national policies and plans; they are often accompanied by targets which health workers are expected to meet. Topics often relate to each other (e.g. smoking and cancer) so cross-references will be provided.