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In response to the Ebola virus (EBOV) crisis of 2013-2016, a recombinant vesicular stomatitis virus (VSV)-based EBOV vaccine was clinically tested (NCT02283099). A single-dose regimen of VSV-EBOV revealed a safe and immunogenic profile and demonstrated clinical efficacy. While EBOV-specific immune responses to this candidate vaccine have previously been investigated, limited human data on immunity to the VSV vector are available. Within the scope of a phase 1 study, we performed a comprehensive longitudinal analysis of adaptive immune responses to internal VSV proteins following VSV-EBOV immunization. While no preexisting immunity to the vector was observed, more than one-third of subjects developed VSV-specific cytotoxic T-lymphocyte responses and antibodies.

Original publication




Journal article


The Journal of infectious diseases

Publication Date





556 - 561


First Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg.


VSV-Ebola Consortium (VEBCON), Humans, Vesiculovirus, Vaccines, Synthetic, Ebola Vaccines, Longitudinal Studies, Antibody Formation, Immunity, Cellular, Adult