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. 2021 Dec 7;9(12):1447. doi: 10.3390/vaccines9121447

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The adjusted vaccine effectiveness (VE) against each strain according to the current vaccination dose and prior vaccination status is shown as a forest plot. (A) Influenza type A, (B) A(H1N1)pdm, (C) A(H3N2), (D) type B, and (E) B(Yam). ^a Stratified variables: enrolment season, clinic, week, and age (1-year interval). Adjusted variables: sex, sibling, nursery school, interval between illness onset and enrolment (0–2/≥3days), medical comorbidities, number of outpatient visits (0–4/5–9/≥10) in the prior season, influenza diagnosis in the prior season, and influenza vaccination until the season before the prior season (0/≥1). ●: Point estimate of the adjusted VE. Black line indicates the 95% confidence interval of the adjusted VE. Note that we could not estimate the VE against B(Vic) because of the small sample size.

The adjusted vaccine effectiveness (VE) against each strain according to the current vaccination dose and prior vaccination status is shown as a forest plot. (A) Influenza type A, (B) A(H1N1)pdm, (C) A(H3N2), (D) type B, and (E) B(Yam). ^a Stratified variables: enrolment season, clinic, week, and age (1-year interval). Adjusted variables: sex, sibling, nursery school, interval between illness onset and enrolment (0–2/≥3days), medical comorbidities, number of outpatient visits (0–4/5–9/≥10) in the prior season, influenza diagnosis in the prior season, and influenza vaccination until the season before the prior season (0/≥1). ●: Point estimate of the adjusted VE. Black line indicates the 95% confidence interval of the adjusted VE. Note that we could not estimate the VE against B(Vic) because of the small sample size.