Isolation precautions are evidence-based practices that interrupt the chain of infection between a colonized or infected source and a susceptible host. Failure to maintain precautions in the clinical setting directly results in healthcare-associated infections (HAIs), which account for approximately 220,000 infections annually in Canadian hospitals and contribute significantly to morbidity, mortality, and healthcare costs. Top 3 nursing priorities: 1. Correctly identify the required precaution tier (Standard, Contact, Droplet, Airborne, or combination) before entering any patient room 2. Ensure full compliance with PPE donning and doffing sequences to prevent self-contamination — doffing errors are the leading cause of healthcare worker exposure 3. Educate patients, families, and interdisciplinary team members on rationale and compliance requirements Common NCLEX trap: Nurses often select the WRONG level of precaution — choosing Droplet when Airborne is required (e.g., measles, varicella, pulmonary TB), or failing to add Contact precautions alongside Droplet for organisms like RSV or influenza in immunocompromised patients. Remember: precaution tiers are additive, not exclusive. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names...