The document discusses concepts of prevention and control in healthcare. It defines four levels of prevention - primordial, primary, secondary, and tertiary. Primordial prevention aims to discourage risk factors before they develop. Primary prevention removes disease possibility through vaccination or lifestyle changes. Secondary prevention detects and treats disease early through screening. Tertiary prevention focuses on rehabilitation for late-stage disease. Control aims to reduce disease incidence, duration, transmission and effects through prevention programs combined with monitoring, surveillance and evaluation. The goals of medicine include promoting, preserving and restoring health and minimizing suffering through prevention strategies.