Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Dynamics of Neutralizing Antibody and T-cell Responses to SARS-CoV-2 and Variants of Concern After Primary Immunization With CoronaVac and Booster With BNT162b2 or ChAdOx1 in Health Care Workers

Version 1 : Received: 27 March 2022 / Approved: 31 March 2022 / Online: 31 March 2022 (14:28:11 CEST)

How to cite: Jantarabenjakul, W.; Sodsai, P.; Chantasrisawad, N.; Jitsatja, A.; Ninwattana, S.; Thippamom, N.; Ruenjaiman, V.; Tan, C.W.; Pradit, R.; Sophonphan, J.; Wacharapluesadee, S.; Wang, L.; Puthanakit, T.; Hirankarn, N.; Putcharoen, O. Dynamics of Neutralizing Antibody and T-cell Responses to SARS-CoV-2 and Variants of Concern After Primary Immunization With CoronaVac and Booster With BNT162b2 or ChAdOx1 in Health Care Workers. Preprints 2022, 2022030411. https://doi.org/10.20944/preprints202203.0411.v1 Jantarabenjakul, W.; Sodsai, P.; Chantasrisawad, N.; Jitsatja, A.; Ninwattana, S.; Thippamom, N.; Ruenjaiman, V.; Tan, C.W.; Pradit, R.; Sophonphan, J.; Wacharapluesadee, S.; Wang, L.; Puthanakit, T.; Hirankarn, N.; Putcharoen, O. Dynamics of Neutralizing Antibody and T-cell Responses to SARS-CoV-2 and Variants of Concern After Primary Immunization With CoronaVac and Booster With BNT162b2 or ChAdOx1 in Health Care Workers. Preprints 2022, 2022030411. https://doi.org/10.20944/preprints202203.0411.v1

Abstract

Inactivated SARS-CoV-2 vaccine (CoronaVac) is commonly used in national immunization programs. However, the immune response significantly declined within a few months. Our study assessed the immune response against SARS-CoV-2 after receiving booster shots of BNT162b2 or ChAdOx1 among health care workers who previously received CoronaVac as their primary immunization. Fifty-six participants received ChAdOx1 and forty-two participants received BNT162b2 were enrolled into this study which evaluated the immune responses including anti-SARS-CoV-2 spike total antibodies (Elecsys®), surrogated viral neutralization test (sVNT) to ancestral strain (cPass; GenScript) and five variants of concern (Alpha, Beta, Gamma, Delta, and Omicron) (Luminex; multiplex sVNT) and the ELISpot with spike (S1 and S2) peptide pool against the ancestral SARS-CoV-2 strain. The samples were analyzed at baseline, 4, and 12 weeks after primary immunization as well as 4 and 12 weeks after receiving the booster. This study showed a significantly higher B-cell response among the BNT162b2 than the ChAdOx1 booster group, particularly against the Omicron variant, as well as a trend of good T-cell immune response in the BNT162b2 group. Moreover, the immune response rapidly declined at 12 weeks after the booster. A fourth dose or a second booster should be recommended, especially for reducing Omicron severity.

Keywords

COVID-19; SARS-CoV-2; Vaccines; anti-SARS-CoV-2 spike total antibodies; Surrogate viral neutralizing antibody; T-cell immune response; CoronaVac; ChAdOx1; BNT162b2; booster

Subject

Medicine and Pharmacology, Immunology and Allergy

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.