This article considers the investment case for using the Vi polysaccharide vaccine (Vi) in developing countries from two perspectives: reducing typhoid cases and limiting new health care spending. Consumer demand functions that predict probabilities of adults and children purchasing typhoid...

Social interactions make communicable disease a core concern of public health policy. A prevalent problem is scarcity of empirical evidence that are informative about how interventions affect population behavior and illness. Randomized trials, which have been important to evaluation of...