Efficient sensing of a four-segmented Rift Valley fever virus vaccine candidate by human monocytes.

Nair, Niranjana; Friese, Julia; Schreur, Paul J Wichgers; Osterhaus, Albert D M E; Rimmelzwaan, Guus F; Prajeeth, Chittappen Kandiyil · J Infect Dis · 2026

basic_science · Level V

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Abstract

The live-attenuated RVFV-4s vaccine against Rift Valley Fever has demonstrated safety and efficacy across multiple animal models and in a phase-I clinical trial. In this study, we examined its impact on innate immune responses and found that RVFV-4s enhances the expression of costimulatory molecules critical for T cell activation, while also triggering proinflammatory responses in primary human monocytes.