This document discusses levels of prevention in healthcare. It defines three levels of prevention: primary, secondary, and tertiary. Primary prevention aims to prevent disease before it occurs. Secondary prevention detects and treats disease in early or pre-symptomatic stages. Tertiary prevention aims to soften the impact of an already-established disease by restoring function and reducing further deterioration or complications. The document outlines learning objectives and activities for students to identify examples of each prevention level in home and hospital settings.