Serological responses to COVID-19 Comirnaty booster vaccine, London, United Kingdom, September to December 2021
- PMID: 34991777
- PMCID: PMC8739342
- DOI: 10.2807/1560-7917.ES.2022.27.1.2101114
Serological responses to COVID-19 Comirnaty booster vaccine, London, United Kingdom, September to December 2021
Abstract
Serum samples were collected pre- and post-booster vaccination with Comirnaty in 626 participants (aged ≥ 50 years) who had received two Comirnaty doses < 30 days apart, two Comirnaty doses ≥ 30 days apart or two Vaxzevria doses ≥ 30 days apart. Irrespective of primary vaccine type or schedule, spike antibody GMTs peaked 2-4 weeks after second dose, fell significantly ≤ 38 weeks later and rose above primary immunisation GMTs 2-4 weeks post-booster. Higher post-booster responses were observed with a longer interval between primary immunisation and boosting.
Keywords: Antibody; AstraZeneca, Comirnaty, Vaxzevria; COVID-19; COVID-Vaccine; Immunity; Pfizer; Spike Protein.
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