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. 2014;10(5):1171-80.
doi: 10.4161/hv.28221. Epub 2014 Mar 7.

Cost-effectiveness analysis of universal influenza vaccination with quadrivalent inactivated vaccine in the United States

Karen M Clements  1 , Genevieve Meier  2 , Lisa J McGarry  1 , Narin Pruttivarasin  1 , Derek A Misurski  2
Affiliations

Cost-effectiveness analysis of universal influenza vaccination with quadrivalent inactivated vaccine in the United States

Karen M Clements et al. Hum Vaccin Immunother. 2014.

Abstract

To address influenza B lineage mismatch and co-circulation, several quadrivalent inactivated influenza vaccines (IIV4s) containing two type A strains and both type B lineages have recently been approved in the United States. Currently available trivalent inactivated vaccines (IIV3s) or trivalent live attenuated influenza vaccines (LAIV3s) comprise two influenza A strains and one of the two influenza B lineages that have co-circulated in the United States since 2001. The objective of this analysis was to evaluate the cost-effectiveness of a policy of universal vaccination with IIV4 vs. IIV3/LAIV3 during 1 year in the United States. On average per influenza season, IIV4 was predicted to result in 30,251 fewer influenza cases, 3512 fewer hospitalizations, 722 fewer deaths, 4812 fewer life-years lost, and 3596 fewer quality-adjusted life-years (QALYs) lost vs. IIV3/LAIV3. Using the Fluarix Quadrivalent(TM) (GlaxoSmithKline) prices and the weighted average IIV3/LAIV3 prices, the model predicts that the vaccination program costs would increase by $452.2 million, while direct medical and indirect costs would decrease by $111.6 million and $218.7 million, respectively, with IIV4. The incremental cost-effectiveness ratio (ICER) comparing IIV4 to IIV3/LAIV3 is predicted to be $90,301/QALY gained. Deterministic sensitivity analyses found that influenza B vaccine-matched and mismatched efficacies among adults aged ≥65 years had the greatest impact on the ICER. Probabilistic sensitivity analysis showed that the cost per QALY remained below $100,000 for 61% of iterations. In conclusion, vaccination with IIV4 in the US is predicted to reduce morbidity and mortality. This strategy is also predicted to be cost-effective vs. IIV3/LAIV3 at conventional willingness-to-pay thresholds.

Keywords: Markov model; United States; cost-effectiveness; influenza; quadrivalent inactivated vaccine.

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Figures

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Figure 1. DSA tornado diagram comparing IIV4 vs. IIV3/LAIV3.
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Figure 2. Scatter plot of incremental costs vs. incremental QALYs.
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Figure 3. Model.
See this image and copyright information in PMC

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