Diverging humoral and cellular immune responses due to Omicron-a national study from the Faroe Islands.
Microbiol Spectr
; 11(6): e0086523, 2023 Dec 12.
Article
em En
| MEDLINE
| ID: mdl-37909772
ABSTRACT
IMPORTANCE The immunity following infection and vaccination with the SARS-CoV-2 Omicron variant is poorly understood. We investigated immunity assessed with antibody and T-cell responses under different scenarios in vaccinated and unvaccinated individuals with and without Omicron infection. We found that the humoral response was higher among vaccinated-naïve than unvaccinated convalescent. Unvaccinated with and without infection had comparable low humoral responses, whereas vaccinated with a second or third dose, independent of infection status, had increasingly higher levels. Only a minor fraction of unvaccinated individuals had detectable humoral responses following Omicron infection, while almost all had positive T-cell responses. In conclusion, primary Omicron infection mounts a low humoral immune response, enhanced by prior vaccination. Omicron infection induced a robust T-cell response in both unvaccinated and vaccinated, demonstrating that immune evasion of primary Omicron infection affects humoral immunity more than T-cell immunity.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Evasão da Resposta Imune
/
Imunidade Humoral
Limite:
Humans
País/Região como assunto:
Europa
Idioma:
En
Revista:
Microbiol Spectr
Ano de publicação:
2023
Tipo de documento:
Article