What You Should Be Reading: : Influenza

Update: Influenza Activity — United States, October 1, 2017–February 3, 2018

Monday, February 19, 2018   (0 Comments)
Posted by: Jess Warner
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Interim estimates of 2017–18 season vaccine effectiveness (VE) against influenza A and influenza B virus infection associated with medically attended acute respiratory illness in the United States was 36% (95% confidence interval [CI] = 27%–44%). VE was estimated to be 25% (95% CI = 13%–36%) against illness caused by influenza A(H3N2) virus, 67% (95% CI = 54%–76%) against A(H1N1)pdm09 virus and 42% (95% CI = 25%–56%) against influenza B virus (7). During the 2014–15 season, an A(H3N2) virus–predominant season with high severity and low vaccine effectiveness, influenza vaccine was estimated to have prevented millions of illnesses and tens of thousands of influenza-related hospitalizations. With several more weeks of elevated influenza activity expected, an increasing proportion of influenza A(H1N1)pdm09 and influenza B viruses, and the potential to prevent significant illness through influenza vaccination, CDC continues to recommend influenza vaccination at this time.



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