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Updated: Jun 6, 2026

Rapid Molecular Detection and Differentiation of Influenza Viruses A and B
Published on: January 30, 2017
Comparison of influenza vaccine effectiveness using different methods of case detection: clinician-ordered rapid
Laura A Coleman1, Burney Kieke, Stephanie Irving
1Epidemiology Research Center, Marshfield Clinic Research Foundation, Marshfield, WI 54449, USA. Coleman.laura@mcrf.mfldclin.edu
Abstract:
Annual evaluation of influenza vaccine effectiveness (VE) is needed to assess ongoing impact of immunization efforts in the setting of antigenic drift and periodic vaccine reformulation. Optimal methodology for determining VE remains unclear. We compared influenza VE generated from prospective enrollment and rRT-PCR testing (active surveillance group) with VE based on clinician-ordered diagnostic tests (clinical testing group) in a defined population over four seasons. VE was calculated as (1 - adjusted OR) for vaccination in cases vs. test-negative controls. VE based on clinical testing underestimated VE based on active surveillance and testing with rRT-PCR by 5-33% depending on season.

