Inclusion criteria | |
 1. Studies published from 2009 to 2020 | |
 2. Full and complete studies | |
 3. Studies conducted across the world | |
 4. Studies conducted in real community-level settings i.e., schools, health facilities, and households in humans | |
 5. Studies with water supply, sanitation, hygiene, breastfeeding, and vaccination interventions | |
 6. Studies with a waterborne diarrheal disease outcome or water quality outcome | |
 7. Studies reporting effective intervention outcome | |
 8. Studies with confirmed uptake of an intervention(s) | |
Exclusion criteria | |
 1. Studies not published in the English language | |
 2. Studies with waterborne diarrheal disease(s) and another disease(s) outcome | |
 3. Studies that the researcher did not have full-text access to. | |
 4. Studies that reported hospital-acquired infections/nosocomial infection |