» Articles » PMID: 37766332

Humoral Responses Elicited After a Fifth Dose of SARS-CoV-2 MRNA Bivalent Vaccine

Abstract

While an important part of the world's population is vaccinated against SARS-CoV-2, new variants continue to emerge. We observe that even after a fifth dose of the mRNA bivalent vaccine, most vaccinated individuals have antibodies that poorly neutralize several Omicron subvariants, including BQ.1.1, XBB, XBB.1.5, FD.1.1, and CH.1.1. However, Fc-effector functions remain strong and stable over time against new variants, which may partially explain why vaccines continue to be effective. We also observe that donors who have been recently infected have stronger antibody functional activities, including neutralization and Fc-effector functions, supporting the observations that hybrid immunity leads to better humoral responses.

Citing Articles

Temperature-dependent Spike-ACE2 interaction of Omicron subvariants is associated with viral transmission.

Benlarbi M, Ding S, Belanger E, Tauzin A, Poujol R, Medjahed H mBio. 2024; 15(8):e0090724.

PMID: 38953636 PMC: 11323525. DOI: 10.1128/mbio.00907-24.


Differentiating Cell Entry Potentials of SARS-CoV-2 Omicron Subvariants on Human Lung Epithelium Cells.

Katte R, Ao Y, Xu W, Han Y, Zhong G, Ghimire D Viruses. 2024; 16(3).

PMID: 38543757 PMC: 10975267. DOI: 10.3390/v16030391.

References
1.
Andrews N, Stowe J, Kirsebom F, Toffa S, Rickeard T, Gallagher E . Covid-19 Vaccine Effectiveness against the Omicron (B.1.1.529) Variant. N Engl J Med. 2022; 386(16):1532-1546. PMC: 8908811. DOI: 10.1056/NEJMoa2119451. View

2.
Tegally H, Moir M, Everatt J, Giovanetti M, Scheepers C, Wilkinson E . Emergence of SARS-CoV-2 Omicron lineages BA.4 and BA.5 in South Africa. Nat Med. 2022; 28(9):1785-1790. PMC: 9499863. DOI: 10.1038/s41591-022-01911-2. View

3.
. COVID-19 Vaccine Breakthrough Infections Reported to CDC - United States, January 1-April 30, 2021. MMWR Morb Mortal Wkly Rep. 2021; 70(21):792-793. PMC: 8158893. DOI: 10.15585/mmwr.mm7021e3. View

4.
Ter Meulen J, van den Brink E, Poon L, Marissen W, Leung C, Cox F . Human monoclonal antibody combination against SARS coronavirus: synergy and coverage of escape mutants. PLoS Med. 2006; 3(7):e237. PMC: 1483912. DOI: 10.1371/journal.pmed.0030237. View

5.
Beaudoin-Bussieres G, Laumaea A, Anand S, Prevost J, Gasser R, Goyette G . Decline of Humoral Responses against SARS-CoV-2 Spike in Convalescent Individuals. mBio. 2020; 11(5). PMC: 7569150. DOI: 10.1128/mBio.02590-20. View