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. 2022 Jan;27(1):2101114.
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

Affiliations

Serological responses to COVID-19 Comirnaty booster vaccine, London, United Kingdom, September to December 2021

Georgina Ireland et al. Euro Surveill. 2022 Jan.

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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Conflict of interest statement

Conflict of interest: MER reports that the Immunisation and Vaccine Preventable Diseases Division (UKHSA) has provided vaccine manufacturers with post-marketing surveillance reports on pneumococcal and meningococcal infection, which the companies are required to submit to the UK licensing authority in compliance with their risk management strategy. A cost-recovery charge is made for these reports. EL reports that the UKHSA Vaccine Evaluation Unit does contract research on behalf of GlaxoSmithKline, Sanofi, and Pfizer, which is outside the submitted work.

Figures

Figure
Figure
SARS-CoV-2 S antibody responses < 3 weeks before the second dose of the primary COVID-19 vaccination, after the second dose and after booster dose vaccination in previously uninfected individuals, London, United Kingdom, September–December 2021(n = 626)a

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