Interim estimates of the effectiveness of the influenza vaccine against A(H3N2) influenza in adults in South Korea, 2016-2017 season.

PLoS One · 2017 · PMC5444786 · PMID 28542417

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did not reach statistical significanceno p-value reported

In the US, influenza vaccine was effective to prevent A(H3N2) influenza presenting VE of 43% (95% CI, 29 to 54) in overall aged population, however, in 18–49 years and ≥65 years age group, protection did not reach statistical significance with wide range of confidence interval [ 10 ].

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