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  • Title: Cost-Effectiveness of Quadrivalent versus Trivalent Influenza Vaccine in the United States.
    Author: de Boer PT, Crépey P, Pitman RJ, Macabeo B, Chit A, Postma MJ.
    Journal: Value Health; 2016 Dec; 19(8):964-975. PubMed ID: 27987647.
    Abstract:
    BACKGROUND: Designed to overcome influenza B mismatch, new quadrivalent influenza vaccines (QIVs) contain one additional B strain compared with trivalent influenza vaccines (TIVs). OBJECTIVE: To examine the expected public health impact, budget impact, and incremental cost-effectiveness of QIV versus TIV in the United States. METHODS: A dynamic transmission model was used to predict the annual incidence of influenza over the 20-year-period of 2014 to 2034 under either a TIV program or a QIV program. A decision tree model was interfaced with the transmission model to estimate the public health impact and the cost-effectiveness of replacing TIV with QIV from a societal perspective. Our models were informed by published data from the United States on influenza complication probabilities and relevant costs. The incremental vaccine price of QIV as compared with that of TIV was set at US $5.40 per dose. RESULTS: Over the next 20 years, replacing TIV with QIV may reduce the number of influenza B cases by 27.2% (16.0 million cases), resulting in the prevention of 137,600 hospitalizations and 16,100 deaths and a gain of 212,000 quality-adjusted life-years (QALYs). The net societal budget impact would be US $5.8 billion and the incremental cost-effectiveness ratio US $27,411/QALY gained. In the probabilistic sensitivity analysis, 100% and 96.5% of the simulations fell below US $100,000/QALY and US $50,000/QALY, respectively. CONCLUSIONS: Introducing QIV into the US immunization program may prevent a substantial number of hospitalizations and deaths. QIV is also expected to be a cost-effective alternative option to TIV.
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