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Batch-to-batch consistency trial of an adenovirus type-5 vector-based COVID-19 vaccine in adults aged 18 years and above.
- Source :
-
Expert review of vaccines [Expert Rev Vaccines] 2022 Dec; Vol. 21 (12), pp. 1843-1849. Date of Electronic Publication: 2022 Sep 01. - Publication Year :
- 2022
-
Abstract
- Background: The demonstration of batch-to-batch consistency is indispensable for quality control of vaccines.<br />Methods: We conducted a randomized, double-blind, parallel-controlled trial to evaluate the immunogenicity consistency of a single shot of Ad5-nCoV in healthy adults who had not previously received any COVID-19 vaccine. All eligible participants were randomly assigned equally to receive one of the three consecutive batches of Ad5-nCoV (5 × 10 <superscript>10</superscript> viral particles/vial, 0.5 mL). The primary endpoint was geometric mean titers (GMTs) of serum SARS-CoV-2 receptor-binding domain (RBD)-specific IgG on day 28 post-vaccination.<br />Results: One thousand fifty participants were enrolled, with 350 (33%) participants per group. On day 28 post-vaccination, GMTs in three groups were 78.3 binding antibody units (BAU)/mL (95% CI 70.3-87.3), 82.9 BAU/mL (73.9-92.9), and 78.8 BAU/mL (70.2-88.4), respectively. The two-sided 95% CIs for the GMT ratios between each pair of batches were all between 0.67 and 1.5. The highest incidence of solicited adverse reactions within 7 days post-vaccination was reported by batch 3 recipients (23.1% versus 15.1% in batch 1 recipients and 14.6% in bath 2 recipients; p = 0.0039). None of the serious adverse events were related to vaccination.<br />Conclusions: Immunogenicity consistency between consecutive batches of Ad5-nCoV was well established in adults.<br />Clinical Trial Registration: This trial was registered with ClinicalTrials.gov (NCT05313646).
Details
- Language :
- English
- ISSN :
- 1744-8395
- Volume :
- 21
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Expert review of vaccines
- Publication Type :
- Academic Journal
- Accession number :
- 36048417
- Full Text :
- https://doi.org/10.1080/14760584.2022.2119133