The work yields important information about how the immune system contributes to the early stages of the disease.

Renowned psychiatrist Beatrix Ann Hamburg, whose work advanced understanding of mental health for children and adolescents, died on April 15.

On October 26^th a short symposium was held by Science's office in Cambridge UK, on the theme of disease prevention. The symposium featured some of the speakers who had contributed to Science special feature on this topic on September 21^st. Abstracts of the talks are featured below.

Martin Roland (University of Cambridge)
The global burden of illness is shifting from acute infectious disease to chronic conditions such as diabetes and heart disease. Healthcare systems are adapting slowly to this change and even the most expensive systems show big gaps between the care that patients should receive and the care they actually get. In this talk, I will review what we know about deficiencies in quality of care (the 'Quality Chasm'), and how health services can be organised to provide better care. I will draw particularly on evidence on the role of incentives in improving quality of care.

Scientists have come up with several hypotheses to explain an unusual epidemic affecting agricultural workers in Central America.