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Reduced influenza vaccine effectiveness observed in a select birth cohort

KEY POINT

An analysis published in the Journal of Infectious Diseases of vaccine effectiveness (VE) over five influenza seasons (2010–16) showed reduced effectiveness during the 2015–16 influenza season compared with previous seasons. This reduced effect was most prominent in adults born between 1958 and 1979 (i.e., people in their 40s and 50s) compared with all other birth cohorts combined.