ArticleVaccines2025
Long-Term Follow-Up of T Cell Immunity Against
Article in Vaccines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors.
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Abstract
BACKGROUND/
objectivesAfter the 2022 mpox outbreak also outside Africa, risk groups including people living with HIV (PLWH) were vaccinated with the Modified Vaccinia Ankara-Bavarian Nordic vaccine (MVA-BN). Previous data on PLWH showed that two vaccinations induced specific T cell responses in 64% of the patients and natural monkeypox virus (MPXV) infection in 100%. The initial T cell response assay took place at a median of approximately 100 days post-vaccination and 300 days post-infection.
methodsThis study investigates the durability of T cell immunity in PLWH by retesting patients approximately two years after initial assessment. We were able to retest 27 of 33 vaccinated patients and 7 of 10 patients after MPXV infection. T cells were stimulated with the same orthopoxvirus-derived peptide pools as in the initial study, and interferon (IFN)-γ and interleukin (IL)-2 ELISpot assays were performed.
resultsThe ELISpot assays showed specific T cell responses in 59% and 86% of twice vaccinated and previously infected patients, respectively. Paired analysis revealed no significant differences between previous and current data (short- and long-term follow-up), with IL-2 ELISpot results showing positive correlations at both time points (
conclusionsOur data indicates that T cell responses to
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