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ABSTRACT: Objectives
This study aimed to describe the impact of vaccination and the role of humoral responses on post-COVID-19 syndrome 1 year after the onset of SARS coronavirus type 2 (CoV-2).Methods
This prospective study was conducted through interviews to investigate post-COVID-19 syndrome 6 and 12 months after disease onset in all adult in- and outpatients with COVID-19 at Udine Hospital (March-May 2020). Vaccination status and two different serological assays to distinguish between response to vaccination (receptor-binding domain (RBD) SARS-CoV-2 IgG) and/or natural infection (non-RBD-SARS-CoV-2 IgG) were also assessed.Results
A total of 479 patients (52.6% female; mean age: 53 years) were interviewed 13.5 months (standard deviation: 0.6 months) after acute infection. Post-COVID-19 syndrome was observed in 47.2% of patients (n = 226) after 1 year. There were no significant differences in the worsening of post-COVID-19 symptoms (22.7% vs. 15.8%; p = 0.209) among vaccinated (n = 132) and unvaccinated (n = 347) patients. The presence of non-RBD SARS-CoV-2 IgG induced by natural infection showed a significant association with post-COVID-19 syndrome (OR: 1.35; 95% CI, 1.11-1.64; p = 0.003), and median non-RBD SARS-CoV-2 IgG titres were significantly higher in long haulers than in patients without symptoms (22 kAU/L (interquartile range, 9.7-37.2 kAU/L) vs. 14.1 kAU/L (interquartile range, 5.4-31.3 kAU/L); p = 0.009) after 1 year. In contrast, the presence of RBD SARS-CoV-2 IgG was not associated with the occurrence of post-COVID-19 syndrome (>2500 U/mL vs. 0.9-2500 U/mL; OR: 1.36; 95% CI, 0.62-3.00; p = 0.441), and RBD SARS-CoV-2 IgG titres were similar in long haulers as in patients without symptoms (50% values > 2500 U/mL vs. 55.6% values > 2500 U/mL; p = 0.451).Discussion
The SARS-CoV-2 vaccination is not associated with the emergence of post-COVID-19 symptoms more than 1 year after acute infection. The persistence of high serological titre response induced by natural infection, but not vaccination, may play a role in long-haul COVID-19.
SUBMITTER: Peghin M
PROVIDER: S-EPMC8940723 | biostudies-literature | 2022 Mar
REPOSITORIES: biostudies-literature
Peghin Maddalena M De Martino Maria M Palese Alvisa A Gerussi Valentina V Bontempo Giulia G Graziano Elena E Visintini Erica E D'Elia Denise D Dellai Fabiana F Marrella Francesco F Fabris Martina M Curcio Francesco F Sartor Assunta A Isola Miriam M Tascini Carlo C
Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases 20220323 8
<h4>Objectives</h4>This study aimed to describe the impact of vaccination and the role of humoral responses on post-COVID-19 syndrome 1 year after the onset of SARS coronavirus type 2 (CoV-2).<h4>Methods</h4>This prospective study was conducted through interviews to investigate post-COVID-19 syndrome 6 and 12 months after disease onset in all adult in- and outpatients with COVID-19 at Udine Hospital (March-May 2020). Vaccination status and two different serological assays to distinguish between ...[more]