How do water, sanitation, and hygiene (WASH) programs relate to One Health?

• A. They prevent transmission of enteric pathogens in humans and animals and improve environmental health.
• B. They are unrelated to One Health and focus only on humans.
• C. They address energy use in healthcare facilities.
• D. They primarily concern veterinary vaccine development.

Answer: (A)

Water, sanitation, and hygiene programs cut across human, animal, and environmental health by blocking the ways microbes move through shared spaces. When communities have clean drinking water, safe sanitation, and good handwashing practices, the transmission of enteric pathogens is reduced in people and in livestock, and contamination of soil and water in the environment is lowered. That interconnected impact—protecting health across humans, animals, and their environment through preventing fecal-oral transmission—is at the heart of One Health.

So, WASH is not just about humans in isolation; it directly affects animal health and environmental health as well. By improving sanitation and hygiene, we reduce reservoirs of disease in animals and curb environmental contamination, which in turn protects people. Choices focusing on energy use in facilities or vaccine development don’t capture this broader, cross-species, environmental connection.