Dengue Haemorrhagic Fever.

Dengue Haemmorrhagic Fever (DHF) affects two and a half million people every year, mainly in Africa, Asia and the western Pacific, and kills nearly 24,000 of them, mostly children. Mr Prakash Sethi, at the London School of Hygiene and Tropical Medicine, describes the symptoms, one of which is severe back pain. In research sponsered by the Wellcome Trust, Dr Geoff Garnett, University of Oxford and his colleages, Dr Neil Fergusson and Dr Sumitra Gupta are trying to study the pattern of the disease in the population in the areas most affected. They hope to discover the cause of dengue epidemics.