Immunization deserves high priority, especially in developing countries, for three reasons: vaccine-preventable diseases, disproportionately affect the poorest fifth of the population; immunization is among the most cost-effective interventions, and has a major impact in reducing the burden of...

The handwashing handbook advocates handwashing-with-soap programs to fight the spread of disease. It covers the following components: laying the foundation for a National Handwashing Program; understanding the consumer; and implementing the program. The handbook explains how to research consumer...

When several municipalities unite in a single administrative structure - a process known as aggregation - they can lower the cost of utility services through economies of scale. Aggregation of water supply and sanitation (WSS) services is established practice in some countries and is likely to...