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Zika and chikungunya viruses have caused major epidemics and are transmitted by  Aedes aegypti  and/or  Aedes albopictu s mosquitoes. The “Sementis Copenhagen Vector” (SCV) system is a recently developed vaccinia-based, multiplication-defective, vaccine vector technology that allows manufacture in modified CHO cells. Herein we describe a single-vector construct SCV vaccine that encodes the structural polyprotein cassettes of both Zika and chikungunya viruses from different loci. A single vaccination of mice induces neutralizing antibodies to both viruses in wild-type and IFNAR −/−  mice and protects against (i) chikungunya virus viremia and arthritis in wild-type mice, (ii) Zika virus viremia and fetal/placental infection in female IFNAR −/−  mice, and (iii) Zika virus viremia and testes infection and pathology in male IFNAR −/−  mice. To our knowledge this represents the first single-vector construct, multi-pathogen vaccine encoding large polyproteins, and offers both simplified manufacturing and formulation, and reduced “shot burden” for these often co-circulating arboviruses.

A vaccinia-based single vector construct multi-pathogen vaccine protects against both Zika and chikungunya viruses