The WHO Guide on Cholera Control in Complex Emergencies provides key steps for preparedness, prevention, and response to cholera and other diarrheal diseases in crisis situations. It highlights the importance of early warning systems, rapid response, and coordination among health agencies. The guide outlines measures for case management, water sanitation, hygiene promotion, and outbreak containment, particularly in refugee camps and disaster-affected areas. It emphasizes community involvement, surveillance, and proper health infrastructure to reduce mortality and control disease spread in vulnerable populations​.