Deworm The World Initiative

Organisation

Evidence Action is an international nonprofit organization headquartered in the United States that implements scalable, cost-effective programs to fight poverty. The Deworm the World Initiative is one of its flagship programs, focusing on tackling worm infections through mass deworming campaigns targeting schoolchildren.

Evidence Action works closely with ministries of education and health to develop and implement national deworming programs. The approach is based on strong operational partnerships with governments, technical assistance, and comprehensive program monitoring.

The Problem: Worm Infections

Neglected tropical diseases such as worm infections affect more than one billion people worldwide, especially in regions with poor sanitation. Intestinal worm infections can lead to anemia, malnutrition, stunted growth, and cognitive impairments. School-aged children are particularly at risk.

The economic and social consequences are significant: chronic worm infections impair educational outcomes and can reduce lifetime earnings. Studies show that deworming programs can increase school attendance and improve educational achievement.

Approach

Evidence Action supports governments in systematically conducting national deworming days. Children aged 5 to 14 receive a safe, WHO-recommended dose of anthelmintic medication (Albendazole or Mebendazole).

The programs are based on:

• extensive student registration and needs assessments
• training for teachers on safe medication administration
• widespread implementation in schools
• comprehensive monitoring for quality assurance

Impact

Deworming programs are considered extremely cost-effective. GiveWell estimates that the Deworm the World Initiative can deliver a year of deworming for around $0.50–$0.75 per child in certain contexts. Studies show significant improvements in school attendance rates and long-term income gains from early deworming.

In 2021, Evidence Action reached over 280 million treated children in India, Kenya, Nigeria, and Pakistan.

Transparency

Evidence Action publishes detailed monitoring data and external evaluations regarding program reach and quality. The organization is regularly recommended by GiveWell as one of the most effective charities globally.

Current Projects

India, Kenya, Nigeria, Pakistan (2025)
Evidence Action continues to support national deworming days. At the same time, the organization is working on improving diagnostic methods and refining program implementation to further increase efficiency and impact.