1.WASH is the collective term for Water, Sanitation and Hygiene. Due to their interdependent nature, these three core issues are grouped https://www.researchgate.net/publication/341575181_Introduction_to_Water_Sanitation_and_Hygiene_WASH
2.by K Tayler2020 — A. Water, Sanitation, and Hygiene Conditions in Schools in Mongolia. 1. B. Challenges in Improving … health/hygiene/emergencies/fs2_9.pdf; and Hydromatch https://www.adb.org/sites/default/files/publication/603441/water-sanitation-hygiene-schools-mongolia.pdf