Post-Acute Sequelae After Severe Acute Respiratory Syndrome Coronavirus 2 Infection by Viral Variant and Vaccination Status: A Multicenter Cross-Sectional Study

Author:

Kahlert Christian R12,Strahm Carol1,Güsewell Sabine1,Cusini Alexia3,Brucher Angela4,Goppel Stephan5,Möller Elisabeth6,Möller J Carsten7,Ortner Manuela8,Ruetti Markus9,Stocker Reto10,Vuichard-Gysin Danielle1112,Besold Ulrike13,McGeer Allison14,Risch Lorenz151617,Friedl Andrée18,Schlegel Matthias1,Vernazza Pietro1,Kuster Stefan P1,Kohler Philipp1ORCID,Besold Ulrike,Brucher Angela,Cusini Alexia,Egger Thomas,Friedl Andrée,Goppel Stephan,Grässli Fabian,Kahlert Christian R,Keller Joelle,Kessler Simone,Kohler Philipp,Kuster Stefan P,Leal Onicio,Lemmenmeier Eva,McGeer Allison,Kleeb Dorette Meier,Möller Elisabeth,Möller J Carsten,Müller Maja F,Musa Vaxhid,Ortner Manuela,Rieder Philip,Risch Lorenz,Ruetti Markus,Schlegel Matthias,Schmid Hans-Ruedi,Stocker Reto,Vernazza Pietro,von Kietzell Matthias,Vuichard-Gysin Danielle,Wiggli Benedikt,

Affiliation:

1. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen , St. Gallen , Switzerland

2. Department of Infectious Diseases and Hospital Epidemiology, Children’s Hospital of Eastern Switzerland , St. Gallen , Switzerland

3. Division of Infectious Diseases, Cantonal Hospital of Grisons , Chur , Switzerland

4. Ambulatory Services, Psychiatry Services of the Canton of St. Gallen (South) , St. Gallen , Switzerland

5. Ambulatory Services, Psychiatry Services of the Canton of St. Gallen (North) , St. Gallen , Switzerland

6. Department of Psychiatry, Clienia Littenheid , Littenheid , Switzerland

7. Center for Neurological Rehabilitation , Zihlschlacht , Switzerland

8. Rheintal Werdenberg Sarganserland Hospital Group , Grabs , Switzerland

9. Fuerstenland Toggenburg Hospital Group , Wil , Switzerland

10. Hirslanden Clinic , Zurich , Switzerland

11. Division of Infectious Diseases and Hospital Epidemiology, Thurgau Hospital Group , Muensterlingen , Switzerland

12. Department of Research and Development, Swiss National Centre for Infection Prevention (Swissnoso) , Berne , Switzerland

13. Geriatric Clinic St. Gallen , St. Gallen , Switzerland

14. Sinai Health System , Toronto , Canada

15. Labormedizinisches Zentrum Dr Risch Ostschweiz AG , Buchs , Switzerland

16. Private Universität im Fürstentum Liechtenstein , Triesen , Liechtenstein

17. Center of Laboratory Medicine, University Institute of Clinical Chemistry, University of Bern, Inselspital , Bern , Switzerland

18. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital Baden , Baden , Switzerland

Abstract

Abstract Background Disentangling the effects of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants and vaccination on the occurrence of post-acute sequelae of SARS-CoV-2 (PASC) is crucial to estimate and reduce the burden of PASC. Methods We performed a cross-sectional analysis (May/June 2022) within a prospective multicenter healthcare worker (HCW) cohort in north-eastern Switzerland. HCWs were stratified by viral variant and vaccination status at time of their first positive SARS-CoV-2 nasopharyngeal swab. HCWs without positive swab and with negative serology served as controls. The sum of 18 self-reported PASC symptoms was modeled with univariable and multivariable negative-binomial regression to analyze the association of mean symptom number with viral variant and vaccination status. Results Among 2912 participants (median age: 44 years; 81.3% female), PASC symptoms were significantly more frequent after wild-type infection (estimated mean symptom number: 1.12; P < .001; median time since infection: 18.3 months), after Alpha/Delta infection (0.67 symptoms; P < .001; 6.5 months), and after Omicron BA.1 infections (0.52 symptoms; P = .005; 3.1 months) versus uninfected controls (0.39 symptoms). After Omicron BA.1 infection, the estimated mean symptom number was 0.36 for unvaccinated individuals versus 0.71 with 1–2 vaccinations (P = .028) and 0.49 with ≥3 prior vaccinations (P = .30). Adjusting for confounders, only wild-type (adjusted rate ratio [aRR]: 2.81; 95% confidence interval [CI]: 2.08–3.83) and Alpha/Delta infections (aRR: 1.93; 95% CI: 1.10–3.46) were significantly associated with the outcome. Conclusions Previous infection with pre-Omicron variants was the strongest risk factor for PASC symptoms among our HCWs. Vaccination before Omicron BA.1 infection was not associated with a clear protective effect against PASC symptoms in this population.

Funder

Swiss National Sciences Foundation

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Microbiology (medical)

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