Vaccine effectiveness against medically attended laboratory-confirmed influenza in Japan, 2011-2012 Season.

PLoS One · 2014 · PMC3923823 · PMID 24551167

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a decreasing trendno p-value reported

Additionally, despite the limited sample size, a decreasing trend in VE was observed in our setting; specifically, the adjusted VE against influenza A was 21.7% in the early phase and 8.9% in the late phase.

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