Book excerpt: Schistosomiasis is Africa's second most common parasitic disease. Less than 20 years ago, over 200 million were infected. In many high-risk areas the Schistosomiasis Control Initiative (SCI) has been helping to tackle the disease by offering treatments to millions of children. This book tells the story of a man, Alan Fenwick, who founded the SCI to control the worms and snails and so improve the lives of many burdened with the disease as well as reducing the numbers infected. Over this period SCI and the Ministries of Health and Education in 16 countries delivered over 220 million treatments. Treatment coverage of up to 75% has been achieved. Widely recognised as a cost-effective and successful intervention, SCI's knock-on effects include improving overall physical health, school attendance and future prospects for millions of people.