Published in:
Open Access
01-12-2022 | SARS-CoV-2 | Research
The oldest unvaccinated Covid-19 survivors in South America
Authors:
Mateus V. de Castro, Monize V. R. Silva, Michel S. Naslavsky, Marilia O. Scliar, Kelly Nunes, Maria Rita Passos-Bueno, Erick C. Castelli, Jhosiene Y. Magawa, Flávia L. Adami, Ana I. S. Moretti, Vivian L. de Oliveira, Silvia B. Boscardin, Edecio Cunha-Neto, Jorge Kalil, Emmanuelle Jouanguy, Paul Bastard, Jean-Laurent Casanova, Mauricio Quiñones-Vega, Patricia Sosa-Acosta, Jéssica de S. Guedes, Natália P. de Almeida, Fábio C. S. Nogueira, Gilberto B. Domont, Keity S. Santos, Mayana Zatz
Published in:
Immunity & Ageing
|
Issue 1/2022
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Abstract
Background
Although older adults are at a high risk of severe or critical Covid-19, there are many cases of unvaccinated centenarians who had a silent infection or recovered from mild or moderate Covid-19. We studied three Brazilian supercentenarians, older than 110 years, who survived Covid-19 in 2020 before being vaccinated.
Results
Despite their advanced age, humoral immune response analysis showed that these individuals displayed robust levels of IgG and neutralizing antibodies (NAbs) against SARS-CoV-2. Enrichment of plasma proteins and metabolites related to innate immune response and host defense was also observed. None presented autoantibodies (auto-Abs) to type I interferon (IFN). Furthermore, these supercentenarians do not carry rare variants in genes underlying the known inborn errors of immunity, including particular inborn errors of type I IFN.
Conclusion
These observations suggest that their Covid-19 resilience might be a combination of their genetic background and their innate and adaptive immunity.