在很多容易感染传染病的国家，政府的医疗保健系统都无法满足需求，于是这当中的差距就由从医疗专家到非正规供应商的一系列游离于监管体系之外的供应商来负责弥补。
In many vulnerable countries, the government health-care system cannot meet demand, and a variety of providers are attempting to bridge the gap. These range from medical specialists to informal providers, who work largely outside the regulatory framework.