SARS-CoV-2 immunity and functional recovery of COVID-19 patients 1-year after infection.
Signal Transduct Target Ther
; 6(1): 368, 2021 10 13.
Article
in English
| MEDLINE | ID: covidwho-1467093
ABSTRACT
The long-term immunity and functional recovery after SARS-CoV-2 infection have implications in preventive measures and patient quality of life. Here we analyzed a prospective cohort of 121 recovered COVID-19 patients from Xiangyang, China at 1-year after diagnosis. Among them, chemiluminescence immunoassay-based screening showed 99% (95% CI, 98-100%) seroprevalence 10-12 months after infection, comparing to 0.8% (95% CI, 0.7-0.9%) in the general population. Total anti-receptor-binding domain (RBD) antibodies remained stable since discharge, while anti-RBD IgG and neutralization levels decreased over time. A predictive model estimates 17% (95% CI, 11-24%) and 87% (95% CI, 80-92%) participants were still 50% protected against detectable and severe re-infection of WT SARS-CoV-2, respectively, while neutralization levels against B.1.1.7 and B.1.351 variants were significantly reduced. All non-severe patients showed normal chest CT and 21% reported COVID-19-related symptoms. In contrast, 53% severe patients had abnormal chest CT, decreased pulmonary function or cardiac involvement and 79% were still symptomatic. Our findings suggest long-lasting immune protection after SARS-CoV-2 infection, while also highlight the risk of immune evasive variants and long-term consequences for COVID-19 survivors.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Models, Immunological
/
Antibodies, Neutralizing
/
Spike Glycoprotein, Coronavirus
/
SARS-CoV-2
/
COVID-19
/
Immunologic Memory
/
Antibodies, Viral
Type of study:
Cohort study
/
Diagnostic study
/
Observational study
/
Prognostic study
Topics:
Long Covid
/
Variants
Limits:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Language:
English
Journal:
Signal Transduct Target Ther
Year:
2021
Document Type:
Article
Affiliation country:
S41392-021-00777-z
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