Effectiveness of Flu Vaccines

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Efficacy and effectiveness of influenza vaccines: a systematic review and meta-analysis

Summary from The Lancet Infectious Diseases 10/17/2014 PDF

Background

No published meta-analyses have assessed efficacy and effectiveness of licensed influenza vaccines in the USA with sensitive and
highly specific diagnostic tests to confirm influenza.

Methods

We searched Medline for randomized controlled trials assessing a relative reduction in influenza risk of all circulating influenza
viruses during individual seasons after vaccination (efficacy) and observational studies meeting inclusion criteria (effectiveness).
Eligible articles were published between ...

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