2014
DOI: 10.1016/j.vaccine.2014.06.048
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Vaccine effectiveness against severe laboratory-confirmed influenza in children: Results of two consecutive seasons in Italy

Abstract: This study supports the effectiveness of the seasonal influenza vaccine in preventing visits to the EDs and hospitalisations for ILI in children, although the estimates were not statistically significant and with wide confidence intervals. Future systematic reviews of available data will provide more robust evidence for recommending influenza vaccination in children.

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Cited by 18 publications
(14 citation statements)
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“…The majority of studies made VE estimates for patients of all ages (n=48; one excluded children <10y [85]), with the remainder targeted at adults (≥15y; n=12; 2 restricted to adults ≥50y [27, 87]), children (n=9 [19, 26, 29, 31, 47, 59, 62, 81, 94]), elderly (n=4 [51, 53, 72, 95]), children and adults aged 50+ (n=1 [84]), pregnant women (n=1 [89]), military (n=2 [28, 40]), healthcare workers (n=1 [42]) or people at high-risk or in a target group for vaccination (n=7 [14, 18, 20, 25, 43, 44, 52]).…”
Section: Resultsmentioning
confidence: 99%
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“…The majority of studies made VE estimates for patients of all ages (n=48; one excluded children <10y [85]), with the remainder targeted at adults (≥15y; n=12; 2 restricted to adults ≥50y [27, 87]), children (n=9 [19, 26, 29, 31, 47, 59, 62, 81, 94]), elderly (n=4 [51, 53, 72, 95]), children and adults aged 50+ (n=1 [84]), pregnant women (n=1 [89]), military (n=2 [28, 40]), healthcare workers (n=1 [42]) or people at high-risk or in a target group for vaccination (n=7 [14, 18, 20, 25, 43, 44, 52]).…”
Section: Resultsmentioning
confidence: 99%
“…Five studies did not include some kind of adjustment for age either because they used a stepwise model building approach [36, 40, 62, 92] or restricted the age group studied [72]. Age was usually specified as a categorical variable (n=67), the choices of which varied considerably, but was also used as a linear term (n=9 [12, 29, 47, 59, 80, 81, 108, 87, 88, 95]), cubic spline (n=2 [60, 97]), a matching variable (n=3 [14, 64]) and in one instance as a quadratic term [26]. …”
Section: Resultsmentioning
confidence: 99%
“…Influenza vaccine effectiveness (%) was estimated as (1-aOR) × 100, 11, 12 where aOR was the adjusted odds ratio for influenza vaccination from the final regression model.…”
Section: Methodsmentioning
confidence: 99%
“…Influenza B lineage mismatch could result in partial/incomplete protection of individuals when IIV3s are deployed; the effect of B lineage mismatch on VE is illustrated by the examples summarized in Table 1. [48][49][50] In contrast to VE studies as explained above, randomized and blinded controlled trials provide well-controlled relatively unbiased estimates of the effect of IIVs on the risk of acquiring influenza (i.e., vaccine efficacy). A recent meta-analysis of 34 randomized controlled trials evaluated the impact of lineage mismatch on vaccine efficacy against laboratory-confirmed influenza.…”
Section: Burden Of Influenza B In Europementioning
confidence: 99%