@article{159a76a5610b4f8c97ecc7c4994d828d,
title = "mRNA-based COVID-19 vaccine boosters induce neutralizing immunity against SARS-CoV-2 Omicron variant",
abstract = "Recent surveillance has revealed the emergence of the SARS-CoV-2 Omicron variant (BA.1/B.1.1.529) harboring up to 36 mutations in spike protein, the target of neutralizing antibodies. Given its potential to escape vaccine-induced humoral immunity, we measured the neutralization potency of sera from 88 mRNA-1273, 111 BNT162b, and 40 Ad26.COV2.S vaccine recipients against wild-type, Delta, and Omicron SARS-CoV-2 pseudoviruses. We included individuals that received their primary series recently (<3 months), distantly (6–12 months), or an additional “booster” dose, while accounting for prior SARS-CoV-2 infection. Remarkably, neutralization of Omicron was undetectable in most vaccinees. However, individuals boosted with mRNA vaccines exhibited potent neutralization of Omicron, only 4–6-fold lower than wild type, suggesting enhanced cross-reactivity of neutralizing antibody responses. In addition, we find that Omicron pseudovirus infects more efficiently than other variants tested. Overall, this study highlights the importance of additional mRNA doses to broaden neutralizing antibody responses against highly divergent SARS-CoV-2 variants.",
keywords = "breadth, COVID-19, Delta, infectivity, neutralizing antibodies, Omicron, SARS-CoV-2, spike, vaccination, variants",
author = "Garcia-Beltran, \{Wilfredo F.\} and \{St. Denis\}, \{Kerri J.\} and Angelique Hoelzemer and Lam, \{Evan C.\} and Nitido, \{Adam D.\} and Sheehan, \{Maegan L.\} and Cristhian Berrios and Onosereme Ofoman and Chang, \{Christina C.\} and Hauser, \{Blake M.\} and Jared Feldman and Roederer, \{Alex L.\} and Gregory, \{David J.\} and Poznansky, \{Mark C.\} and Schmidt, \{Aaron G.\} and Iafrate, \{A. John\} and Vivek Naranbhai and Balazs, \{Alejandro B.\}",
note = "Funding Information: We thank Anand Dighe, MD; Andrea Nixon, BS; and the MGH Core Laboratory for excellent assistance with clinical SARS-CoV-2 serology testing. We wish to thank Michael Farzan, PhD, for providing ACE2-expressing 293T cells. A.H. is supported by the DZIF (German Center for Infection Research, TTU 01.709 ; 8009701709 ). B.M.H. is supported by award number T32GM007753 from the National Institute of General Medical Sciences and F30 AI160908 from the National Institute of Allergy and Infectious Diseases . J.F. is supported by T32AI007245 . D.J.G. and M.C.P. were supported by the VIC Innovation Fund . A.G.S. was supported by NIH R01 AI146779 and a Massachusetts Consortium on Pathogenesis Readiness (MassCPR) grant. A.H. is supported by the DZIF (German Center for Infection Research, TTU 01.709 ). This work was supported by the Peter and Ann Lambertus Family Foundation . V.N. received support from a Medscape Young Investigators Lung Cancer Award . A.B.B. was supported by the National Institute on Drug Abuse (NIDA) Avenir New Innovator Award DP2DA040254 , the MGH Transformative Scholars Program , and a Massachusetts Consortium on Pathogenesis Readiness (MassCPR) grant. Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",
year = "2022",
month = feb,
day = "3",
doi = "10.1016/j.cell.2021.12.033",
language = "English",
volume = "185",
pages = "457--466.e4",
journal = "Cell",
issn = "0092-8674",
publisher = "Cell Press",
number = "3",
}