Video-on-Demand Library

20 October 2022

Mohammad Ali
The population level effectiveness of a vaccine may arise as the result of direct protection of vaccinees and vaccine herd protection, which may protect non-vaccinees, vaccinees, or both. Indirect, total, enhanced, and overall vaccine protection are measures of vaccine herd protection. This presentation provides a brief description of the herd protective effects of the oral cholera vaccines, as an example, that have been evaluated for herd protection in various study settings, leveraging the geographic information system (GIS) tools for analyses. The study designs include individually randomized clinical trials, cluster randomized clinical trials, observational cohort studies, and observational case-control studies.

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