Boerma, J. Ties, A. Elisabeth Sommerfelt, Shea O. Rutstein, and Guillermo Rojas. 1990. Immunization: Levels, Trends and Differentials. DHS Comparative Studies No. 1. Columbia, Maryland, USA: Institute for Resource Development.
This report presents the results of comparative analysis of immunization coverage (BCG, DPT, polio, and measles) in 21 developing countries. Where possible, DHS data are compared with data from other national surveys and health information systems.