Tools
Tools
Liu, Xinxue, Munro, Alasdair P S, Feng, Shuo, Janani, Leila, Aley, Parvinder K, Babbage, Gavin, Baxter, David, Bula, Marcin, Cathie, Katrina, Chatterjee, Krishna, Dejnirattisai, Wanwisa, Dodd, Kate, Enever, Yvanne, Qureshi, Ehsaan, Goodman, Anna L, Green, Christopher A, Harndahl, Linda, Haughney, John, Hicks, Alexander, van der Klaauw, Agatha A, Kwok, Jonathan, Libri, Vincenzo, Llewelyn, Martin J, McGregor, Alastair C, Minassian, Angela M, Moore, Patrick, Mughal, Mehmood, Mujadidi, Yama F, Holliday, Kyra, Osanlou, Orod, Osanlou, Rostam, Owens, Daniel R, Pacurar, Mihaela, Palfreeman, Adrian, Pan, Daniel, Rampling, Tommy, Regan, Karen, Saich, Stephen, Serafimova, Teona, Saralaya, Dinesh, Screaton, Gavin R, Sharma, Sunil, Sheridan, Ray, Sturdy, Ann, Supasa, Piyada, Thomson, Emma C, Todd, Shirley, Twelves, Chris, Read, Robert C, Charlton, Sue, Hallis, Bassam, Ramsay, Mary, Andrews, Nick, Lambe, Teresa, Nguyen-Van-Tam, Jonathan S, Cornelius, Victoria, Snape, Matthew D and Faust, Saul N (2022) Persistence of immunogenicity after seven COVID-19 vaccines given as third dose boosters following two doses of ChAdOx1 nCov-19 or BNT162b2 in the UK: three month analyses of the COV-BOOST trial. The Journal of infection. ISSN 1532-2742.
Full text not available from this repository.Abstract
OBJECTIVES
To evaluate the persistence of immunogenicity three months after third dose boosters.
METHODS
COV-BOOST is a multicentre, randomised, controlled, phase 2 trial of seven COVID-19 vaccines used as a third booster dose. The analysis was conducted using all randomised participants who were SARS-CoV-2 naïve during the study.
RESULTS
Among the 2883 participants randomised, there were 2422 SARS-CoV-2 naïve participants until D84 visit included in the analysis with median age of 70 (IQR: 30-94) years. In the participants who had two initial doses of ChAd, schedules using mRNA vaccines as third dose have the highest anti-spike IgG at D84 (e.g. geometric mean concentration of 8674 ELU/ml (95% CI: 7461-10085) following ChAd/ChAd/BNT). However, in people who had two initial doses of BNT there was no significant difference at D84 in people given ChAd versus BNT (geometric mean ratio (GMR) of 0.95 (95%CI: 0.78, 1.15). Also, people given Ad26.COV2.S (Janssen; hereafter referred to as Ad26) as a third dose had significantly higher anti-spike IgG at D84 than BNT (GMR of 1.20, 95%CI: 1.01,1.43). Responses at D84 between people who received BNT (15 μg) or BNT (30 μg) after ChAd/ChAd or BNT/BNT were similar, with anti-spike IgG GMRs of half-BNT (15 μg) versus BNT (30 μg) ranging between 0.74-0.86. The decay rate of cellular responses were similar between all the vaccine schedules and doses.
CONCLUSIONS
84 days after a third dose of COVID-19 vaccine the decay rates of humoral response were different between vaccines. Adenoviral vector vaccine anti-spike IgG concentration at D84 following BNT/BNT initial doses were higher than for a three dose (BNT/BNT/BNT) schedule. Half dose BNT immune responses were similar to full dose responses. While high antibody tires are desirable in situations of high transmission of new variants of concern, the maintenance of immune responses that confer long-lasting protection against severe disease or death is also of critical importance. Policymakers may also consider adenoviral vector, fractional dose of mRNA, or other non-mRNA vaccines as third doses.
| Item Type: | Article |
|---|---|
| Subjects: | QU Biochemistry QW Microbiology. Immunology QZ Pathology. Oncology WB Practice of medicine WC Communicabable diseases WC Communicabable diseases > WC680 Tropical medicine WS Paediatrics. Child health |
| Divisions (November 2021 Onwards): | Infectious Diseases Research and Development |
| Related URLs: | |
| Depositing User: | Mr Richard Rowland |
| Date Deposited: | 21 Apr 2022 15:23 |
| Last Modified: | 22 Apr 2022 12:26 |
| URI: | http://www.repository.uhblibrary.co.uk/id/eprint/5449 |
Actions (login required)
 |
View Item |
