Prevalence and factors associated with health insurance coverage in resource-poor urban settings in Nairobi, Kenya: a cross-sectional study.

Health insurance coverage in Viwandani slums in Nairobi, Kenya, is low. As universal health coverage becomes the growing focus of Kenya's 'Big Four Agenda' for socioeconomic transformation, integrating enabling and need factors in the design of the national health insurance package may scale-up social health protection.