Overview: Includes supplementary material: Over the past 25 years, the world’s population has witnessed an explosion in kno- edge about infectious diseases. The global population is coming to the realization that diseases long recognized to cause substantial suffering, such as malaria, tuberculosis, schistosomiasis, and hepatitis, can be diagnosed and treated, and that transmission can be prevented using tools that are available, and which may be becoming increasingly affordable. The global population is recognizing that few infections are local: the travel of humans, other animals, insects, a
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