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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

oronaVac and ChAdOx1 Vaccination and Gamma Infection Elicited Neutralizing Antibodies against the SARS-CoV-2 Delta Varian

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Fumagalli, Marcilio Jorge [1] ; Castro-Jorge, Luiza Antunes [1] ; de Souza, William Marciel [2] ; de Azevedo, Patrick Orestes [3] ; Hansen, Alana Witt [4] ; Gazzinelli, Ricardo Tostes [3] ; da Fonseca, Benedito Antonio Lopes [1] ; Spilki, Fernando Rosado [4] ; Figueiredo, Luiz Tadeu Moraes [1]
Total Authors: 9
[1] Univ Sao Paulo, Virol Res Ctr, Ribeirao Preto Med Sch, BR-14049900 Ribeirao Preto, SP - Brazil
[2] Univ Texas Med Branch, World Reference Ctr Emerging Viruses & Arboviruse, Dept Microbiol & Immunol, Galveston, TX 77555 - USA
[3] Univ Sao Paulo, Platform Translat Med Oswaldo Cruz Fdn, Ribeirao Preto Med Sch, BR-14049900 Ribeirao Preto - Brazil
[4] Feevale Univ Novo Hamburgo, Hlthy Sci Inst, Mol Microbiol Lab, BR-93525075 Novo Hamburgo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: IRUSES-BASE; v. 14, n. 2 FEB 2022.
Web of Science Citations: 0

The emergence of new SARS-CoV-2 variants represents a constant threat to world public health. The SARS-CoV-2 Delta variant was identified in late 2020 in India; since then, it has spread to many other countries, replacing other predominant lineages and raising concerns about vaccination efficiency. We evaluated the sensitivity of the Delta variant to antibodies elicited by COVID-19 vaccinated (CoronaVac and ChAdOx1) and convalescent individuals previously infected by earlier lineages and by the Gamma variant. No reduction in the neutralizing efficacy of the Delta variant was observed when compared to B lineage and a reduced neutralization was observed for the Gamma variant. Our results indicate that neutralization of the Delta variant is not compromised in individuals vaccinated by CoronaVac or ChAdOx1; however, a reduction in neutralization efficacy is expected for individuals infected by the Gamma variant, highlighting the importance of continuous vaccination even for previously infected individuals. (AU)

FAPESP's process: 18/09383-3 - Study about Flavivirus epitopes with medical importance in Brazil and its antibodies
Grantee:Marcilio Jorge Fumagalli
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 20/05527-0 - Bivalent intranasal vaccine using influenza virus expressing SARS-CoV-2 protein S (spike): protection mechanisms and lung injury
Grantee:Ricardo Tostes Gazzinelli
Support type: Regular Research Grants
FAPESP's process: 19/26119-0 - Emerging and re-emerging viruses: biology, pathogenesis and prospection
Grantee:Eurico de Arruda Neto
Support type: Research Projects - Thematic Grants