SynthesisImmunologic research2024
QuantiFERON SARS-CoV-2 assay for the evaluation of cellular immunity after immunization with mRNA SARS-CoV-2 vaccines: a systematic review and meta-analysis.
Synthesis in Immunologic research, 2024. 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
A systematic review and meta-analysis were performed to evaluate the virus-specific T-cell response after COVID-19 mRNA vaccination, using the QuantiFERON SARS-CoV-2 interferon-γ release assay. A search was conducted (June 8, 2023) in the PUBMED, SCOPUS, and medRxiv databases, to identify studies reporting the QuantiFERON SARS-CoV-2 (Starter (two antigen tubes) or Starter + Extended Pack (three antigen tubes), cut-off ≥ 0.15 IU/mL) positivity rate (PR) in immunocompetent adults, following the administration of two or three COVID-19 mRNA vaccine doses. Study quality was evaluated with the Critical Appraisal Skills Programme Tool. A meta-analysis was conducted using a random-effects model. Heterogeneity and publication bias were assessed. Eleven eligible studies (with 5-73 vaccinated immunocompetent participants) were identified. For COVID-19-naïve participants, ≤ 3 months after the second dose, the pooled PR (random-effects model) was 86 (95% confidence interval (95% CI) 78-95%). Comparing the Starter vs. the Starter + Extended Pack, a significant difference in PRs was detected (80.6% vs. 100% p-value < 0.001). At 3-6 and >6 months after the second dose and ≥ 3 months after the third dose, the pooled PRs were 59% (95% CI 45-72%), 79% (95% CI 66-92%), and 66% (95% CI 50-82%), respectively. For convalescent participants, ≥ 6 months after the third dose, the pooled PR was 81% (95% CI 67-95%). Limitations include heterogeneity and a small number of studies, at some timepoints. In conclusion, following the second or third COVID-19 mRNA vaccine dose, QuantiFERON SARS-CoV-2 detected positive responses in a certain percentage of the vaccinees, possibly because of waning immunity, reduced assay sensitivity, or lack of T-cell response induction in some vaccinees. The detection of positive responses was higher when the Starter + Extended Pack was used. PROSPERO Registration Number: CRD42023431315.
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