A new World Bank study looks at the impact of two large-scale, government-implemented handwashing and sanitation programs in rural Tanzania. Participating wards received sanitation programming, handwashing programming, both interventions together or neither. This study found that the wards that received both handwashing and sanitation programming were less likely to have visible feces around their latrines and more likely to have handwashing stations near their latrines. This furthers our belief that handwashing and sanitation programs should be integrated.
The study can be found at: http://documents.worldbank.org/curated/en/2015/01/23804984/promoting-handwashing-sanitation-evidence-large-scale-randomized-trial-rural-tanzania