A single mRNA immunization boosts cross-variant neutralizing antibodies elicited by SARS-CoV-2 infection.
medRxiv
; 2021 Mar 10.
Article
em En
| MEDLINE
| ID: mdl-33758873
ABSTRACT
Emerging SARS-CoV-2 variants have raised concerns about resistance to neutralizing antibodies elicited by previous infection or vaccination. We examined whether sera from recovered and naive donors collected prior to, and following immunizations with existing mRNA vaccines, could neutralize the Wuhan-Hu-1 and B.1.351 variants. Pre-vaccination sera from recovered donors neutralized Wuhan-Hu-1 and sporadically neutralized B.1.351, but a single immunization boosted neutralizing titers against all variants and SARS-CoV-1 by up to 1000-fold. Neutralization was due to antibodies targeting the receptor binding domain and was not boosted by a second immunization. Immunization of naïve donors also elicited cross-neutralizing responses, but at lower titers. Our study highlights the importance of vaccinating both uninfected and previously infected persons to elicit cross-variant neutralizing antibodies.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
MedRxiv
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Estados Unidos