Figure 3

Tom Williams is Professor of Haemoglobinopathy Research at Imperial College London. As a clinical academic he has been studying the epidemiology of haemoglobin disorders for more than 20 years, both in terms of the malaria protective effects of carrier forms and the global burden and consequences of homozygosity, particularly in relation to sickle cell disease. Based in Kenya for the last 15 years, he has recognised the growing importance of sickle cell disease as the country has entered its epidemiological transition. He co-chairs the Infectious Diseases Working Group of the Global Sickle Cell Disease Network.