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Durable humoral immunity and long-term protection induced by a Crimean-Congo hemorrhagic fever virus replicon particle vaccine in mice
- Sorvillo, Teresa E;
- Karaaslan, Elif;
- Davies, Katherine A;
- Welch, Stephen R;
- Scholte, Florine EM;
- Coleman-McCray, JoAnn D;
- Aida-Ficken, Virginia;
- Pegan, Scott D;
- Bergeron, Éric;
- Montgomery, Joel M;
- Spiropoulou, Christina F;
- Spengler, Jessica R
Published Web Location
https://doi.org/10.1038/s41541-025-01293-9Abstract
A Crimean-Congo hemorrhagic fever virus replicon particle vaccine was evaluated for long-term immunity and efficacy in mice. IgG responses persisted up to 18 months, with similar titers across dosing strategies through 12 months. Protective efficacy reached ≥75% at 6 months (prime-only) and up to 12 months (prime-boost). Booster dosing enhanced antibody avidity, effector function, and improved long-term protection. These findings support durable immunity from single or boosted vaccination.
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