This document discusses the principles of first aid. It defines first aid as immediate care given to an injured or ill person without medical equipment, until proper treatment arrives. The key principles are to first do no harm, recognize first aid is imperfect, and prioritize the most urgent injuries. Safety is paramount during first aid. The document outlines how to assess an emergency, contact emergency services if needed, survey the scene, examine the victim, and perform essential interventions like CPR. The goal of first aid is to stabilize the person until emergency medical treatment can take over.