Key features of a health system that can influence decision-making about how to address a health system problem.

The taxonomy is drawn from Health Systems Evidence (http://www.healthsystemsevidence.org), which is an adapted and more detailed operationalization of the WHO “building blocks of health systems” [15], and the examples are drawn from a range of sources (e.g., [21]). The word “care” within the section of delivery arrangements could be replaced by programs and services or by prevention, treatment, and support when the focus is more on public health than on clinical care.