Level of influenza virus strain antibodies in healthy vaccinated people at the end of the COVID-19 pandemic

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Abstract

Introduction. Abnormally low global influenza detection rates were observed at the peak of ongoing COVID-19 infection. In the 2021–2022 season, influenza resumed circulation, and in December 2022 its incidence rate returned to the 2015–2016 season levels, which exceeded the highest value recorded in 2018 worldwide. There is a need to assess changes in pattern of population immunity after influenza vaccination during the global COVID-19 pandemic. The study was aimed at analyzing level of vaccine influenza virus strain antibodies in healthy people formed during the COVID-19 pandemic.

Materials and methods. A total of 123 healthy volunteers immunized with influenza quadrivalent inactivated subunit adjuvanted vaccine and 47 unimmunized volunteers were enrolled in the study. Influenza virus strains antibodies were assessed by performing a hemagglutination inhibition (HI) test one month after vaccination.

Results. A significantly increased seroprotection rate (SPR) (p < 0.05) was show in main group that reached 78.9% against the A/Victoria/2570/2019(H1N1)pdm09 strain, 94.3% — against A/H3N2/Darwin strain /9/2021, 69.1% — against B/Phuket/3073/13 strain and 48.8% — against B/Austria/1359417/2021 strain one month after vaccination. The GMT ratio to influenza A(H1N1), B (Victoria) and B (Yamagata) viruses exceeded the required minimum value (p < 0.05) and comprised 4.1 (CI 3.68–4.54), 3.80 (CI 3.33–4.33) and 4.76 (CI 3.87–5.47), respectively. The post-vaccination GMT ratio to influenza A(H3N2) virus was 2.45, which is lower than the required level of 2.50 (p < 0.05). The seroconversion rate (SCR) for strains A/Victoria/2570/2019(H1N1)pdm09, B/Phuket/3073/2013 and B/Austria/1359417/2021 was 56.1%, 50.4% and 51.2%, respectively. The SCR of the influenza A(H3N2) virus like GMT ratio was minimal among the four strains (p < 0.05) and comprised 38.2%.

Conclusion. The vaccine-related immunogenic activity met the requirements for inactivated seasonal influenza vaccines by at least one criterion.

About the authors

S. V. Iushkova

I.M. Sechenov First State Medical University (Sechenov University)

Author for correspondence.
Email: sofia-b@bk.ru

PhD Student, Department of Epidemiology and Modern Vaccination Technologies of Professional Education Institute

Russian Federation, Moscow

M. P. Kostinov

I.M. Sechenov First State Medical University (Sechenov University); I. Mechnikov Research Institute of Vaccines and Sera

Email: sofia-b@bk.ru

Honored Scientist of the Russian Federation, RAS Corresponding Member, DSc (Medicine), Professor, Head of the Department of Epidemiology and Modern Vaccination Technologies, Head of the Laboratory for Vaccine Prevention and Immunotherapy of Allergic Diseases

Russian Federation, Moscow; Moscow

L. S. Gladkova

D.D. Pletnev City Clinical Hospital of the Moscow City Health Department; National Research Center “Institute of Immunology” of the Federal Medical-Biological Agency of Russia

Email: sofia-b@bk.ru

PhD (Medicine), Deputy Head Physician for Sanitary and Epidemiology, Associate Professor, Department of Epidemiology and Social Hygiene

Russian Federation, Moscow; Moscow

A. A. Kameleva

D.D. Pletnev City Clinical Hospital of the Moscow City Health Department; Russian University of Peoples’ Friendship named after Patrice Lumumba

Email: sofia-b@bk.ru

PhD (Medicine), Allergist-Immunologist, Consultative and Diagnostic Department, Assistant Professor of the Department of Clinical Immunology, Allergy, and Adaptation of the Faculty of Continuous Medical Education of the Medical Institute

Russian Federation, Moscow; Moscow

A. S. Kachnova

D.D. Pletnev City Clinical Hospital of the Moscow City Health Department

Email: sofia-b@bk.ru

Allergist-Immunologist, Consultative and Diagnostic Department

Russian Federation, Moscow

A. M. Kostinova

I.M. Sechenov First State Medical University (Sechenov University); D.D. Pletnev City Clinical Hospital of the Moscow City Health Department

Email: sofia-b@bk.ru

Assistant Professor, Department of Epidemiology and Modern Vaccination Technologies, Allergist-Immunologist

Russian Federation, Moscow; Moscow

I. L. Solovyeva

Ulyanovsk State University

Email: sofia-b@bk.ru

DSc (Medicine), Professor, Head of the Department of Pediatrics, faculty of medicine named after T.Z. Biktimirov Institute of Medicine, Ecology and Physical Education

Russian Federation, Ulyanovsk

N. P. Andreeva

Chuvash State University

Email: sofia-b@bk.ru

PhD (Medicine), Associate Professor, Department of Healthcare Organization and Information Technologies in Medicine

Russian Federation, Cheboksary

Yu. A. Dagil

National Research Center “Institute of Immunology” of the Federal Medical-Biological Agency of Russia

Email: sofia-b@bk.ru

PhD (Biology), Researcher

Russian Federation, Moscow

N. Yu. Nastaeva

Novorossiysk Clinical Center of Federal Medical Biological Agency

Email: sofia-b@bk.ru

Epidemiologist

Russian Federation, Novorossiysk

N. O. Kryukova

Pirogov Russian National Research Medical University (Pirogov Medical University)

Email: sofia-b@bk.ru

Assistant Professor, Department of Hospital Therapy, Pediatrics Faculty

Russian Federation, Moscow

M. N. Loktionova

I.M. Sechenov First State Medical University (Sechenov University); I. Mechnikov Research Institute of Vaccines and Sera; Central Research Institute of Epidemiology of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)

Email: sofia-b@bk.ru

PhD (Medicine), Associate Professor, Department of Epidemiology and Modern Vaccination Technologies, Senior Researcher, Laboratory of Epidemiology, Senior Researcher, Laboratory of Epidemiology of Natural Focal Infections

Russian Federation, Moscow; Moscow; Moscow

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Copyright (c) 2024 Iushkova S.V., Kostinov M.P., Gladkova L.S., Kameleva A.A., Kachnova A.S., Kostinova A.M., Solovyeva I.L., Andreeva N.P., Dagil Y.A., Nastaeva N.Y., Kryukova N.O., Loktionova M.N.

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