BIO Web Conf.
Volume 22, 2020International Conference “Longevity Interventions 2020” (ICLI 2020)
|Number of page(s)||6|
|Section||Actual Problems of Medicine|
|Published online||06 July 2020|
The results of clinical trial on immunogenicity of adjuvanted quadrivalent inactivated subunit influenza vaccine Grippol Quadrivalent in pediatric population 6 to 17 years old
Ural State Medical University, 620014, Yekaterinburg, Russian Federation
2 Perm State Medical University, 614000, Perm, Russian Federation
3 Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Russian Agency for Consumer Rights Protection ‘Rospotrebnadzor’, 620014 Yekaterinburg, Russian Federation
* Corresponding author: email@example.com
Russian health care workers currently use trivalent influenza vaccines with a strain of a single lineage of type B virus. The purpose of our study was to evaluate the immunogenicity of an adjuvanted quadrivalent inactivated subunit influenza vaccine Grippol Quadrivalent in pediatric population 6 to 17 years old. We compared this new vaccine to a trivalent Grippol Plus vaccine in terms of immunogenicity against certain strains of influenza virus. A multicenter double-blind randomized controlled clinical study was conducted in 440 pediatric subjects (age groups: 6 to 11; 12 to 17 y.o.); 221 subjects received Grippol Quadrivalent, 219 – Grippol Plus. Vaccine immunogenicity was evaluated by seroprotection rate (SPR), seroconversion rate (SCR), geometric mean titer (GMT) of antibodies, and an X-fold rise in antibodies level (↑GMT). Antibodies quantification was done using hemagglutination inhibition assay (HAI) in serial serum dilutions. No significant differences were found between the two vaccines’ performance against A(H1N1), A(H3N2) strains or Victoria B virus. With respect to type A virus, both vaccines satisfied three of CPMP criteria (SPR, SCR, ↑GMT). With respect to Victoria B virus, the two vaccines met but one CPMP criterion (↑GMT). The immunogenicity against Yamagata B virus was evaluated only for Grippol Quadrivalent vaccine which met two of CPMP requirements (SCR, ↑GMT). Our findings suggest that in terms of its prophylactic efficiency, Grippol Quadrivalent vaccine is no inferior to the Grippol Plus one.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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