What WASH interventions are essential in disaster response to prevent diarrheal and other infectious diseases?

• A. Safe water supply, chlorination/disinfection, latrines, handwashing facilities, solid waste management, food safety, vector control, and hygiene promotion
• B. Only bottled water distribution
• C. Handwashing promotion alone
• D. Medical treatment without water sanitation

Answer: (A)

The main idea is that preventing diarrheal and other infectious diseases in disasters requires a comprehensive WASH approach that blocks multiple transmission pathways. The most effective answer includes a full package: a safe water supply with chlorine or disinfection to ensure drinking water is free of pathogens; latrines and solid waste management to stop environmental contamination; handwashing facilities and hygiene promotion to change practices and reduce fecal-oral spread; plus food safety and vector control to address behavioral and environmental risks that can spark outbreaks. In disaster settings, relying on bottled water alone misses ongoing contamination risks and doesn’t address sanitation, waste, or hygiene behaviors; promoting handwashing without facilities or water likewise falls short, and medical treatment without improvements in water and sanitation doesn’t prevent new cases. Together, these interventions create multiple, layered barriers that substantially reduce the chance of diarrheal and other infectious disease spread.