Abstract
Over the last 50 years, developments in genetics have revolutionised our approach to understanding the nature and cause of much human disease. These advances include being able to diagnose and offer prevention through prenatal diagnosis for many serious single-gene disorders. Furthermore new treatments through gene and stem-cell therapy are being researched. It is also becoming possible to determine an individual’s response to drug treatments and susceptibility to various infections. Recent evidence suggests that particular pathogens may affect the clinical manifestations of certain single-gene disorders. In fact understanding the role of pathogens in both rare unifactorial disorders and in more common multifactorial conditions will be one of the major challenges facing medicine in the future.
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