A comprehensive hand hygiene poster should include the following elements:
1. Clear and Concise Instructions: Step-by-step guide on how to wash hands properly. 2. Visuals and Diagrams: Illustrations demonstrating the correct handwashing technique. 3. Importance of Hand Hygiene: Information on why hand hygiene is crucial for preventing infections. 4. Hand Sanitizer Use: Guidelines for using hand sanitizers when soap and water are not available. 5. Targeted Messages: Tailored messages for specific audiences, such as healthcare workers or school children.