Unmasking herd protection by an oral cholera vaccine in a cluster-randomized trial

ConclusionConsistent with past studies, substantial OCV herd protective effects were identified, but were unmasked only by analysing innermost households of the clusters. Caution is needed in defining clusters for analysis of vaccine herd effects in CRTs of vaccines.
Source: International Journal of Epidemiology - Category: Epidemiology Source Type: research