Trends in effectiveness of inactivated influenza vaccine in children by age groups in seven seasons immediately before the COVID-19 era

• Published in: Vaccine Vol. 40; no. 22; pp. 3018 - 3026
• Main Authors: Shinjoh, Masayoshi, Furuichi, Munehiro, Kobayashi, Hisato, Yamaguchi, Yoshio, Maeda, Naonori, Yaginuma, Mizuki, Kobayashi, Ken, Nogayama, Taisuke, Chiga, Michiko, Oshima, Mio, Kuramochi, Yuu, Yamada, Go, Narabayashi, Atsushi, Ookawara, Ichiro, Nishida, Mitsuhiro, Tsunematsu, Kenichiro, Kamimaki, Isamu, Shimoyamada, Motoko, Yoshida, Makoto, Shibata, Akimichi, Nakata, Yuji, Taguchi, Nobuhiko, Mitamura, Keiko, Takahashi, Takao
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 11.05.2022; Elsevier Limited
• Subjects: Adolescent; Age; Age groups; Allergy and Immunology; Case-Control Studies; Child; Child, Preschool; Children; confidence interval; Confidence intervals; Coronaviruses; COVID-19; COVID-19 - epidemiology; COVID-19 - prevention & control; COVID-19 era; COVID-19 infection; COVID-19 vaccines; Deactivation; Disease transmission; Hospitals; Humans; Immunization; Infant; Influenza; Influenza A; Influenza A Virus, H1N1 Subtype; Influenza A Virus, H3N2 Subtype; Influenza B; Influenza B virus; Influenza Vaccines; Influenza, Human - epidemiology; Influenza, Human - prevention & control; Maternal & child health; Outpatient care facilities; Patients; Seasons; Software; Test-negative design; Vaccination; Vaccine; Vaccine effectiveness; Vaccine efficacy; Vaccines; Vaccines, Inactivated; Viral diseases; United States > US; Japan; Vaccine; Children; Test-negative design; Influenza; COVID-19 era; Vaccine effectiveness

•Flu vaccine effectiveness for children was analyzed for 2013/14 to 2019/20.•Recent inactivated flu vaccine is effective in children and infants for flu A.•Vaccine effectiveness was highest among 1 to 2 year olds for flu A and flu B.•Flu vaccine effectively prevents flu A hospital admission in child...