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    Model-based assessment of public health impact and cost-effectiveness of dengue vaccination following screening for prior exposure

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    Author
    España, Guido
    Anderson, Kathryn B.
    Fitzpatrick, Meagan C.
    Yao, Yutong
    Date
    2019-07-01
    Journal
    PLoS neglected tropical diseases
    Publisher
    Public Library of Science
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://doi.org/10.1371/journal.pntd.0007482
    Abstract
    The tetravalent dengue vaccine CYD-TDV (Dengvaxia) is the first licensed vaccine against dengue, but recent findings indicate an elevated risk of severe disease among vaccinees without prior dengue virus (DENV) exposure. The World Health Organization currently recommends CYD-TDV only for individuals with serological confirmation of past DENV exposure. Our objective was to evaluate the potential health impact and cost-effectiveness of vaccination following serological screening. To do so, we used an agent-based model to simulate DENV transmission with and without vaccination over a 10-year timeframe. Across a range of values for the proportion of vaccinees with prior DENV exposure, we projected the proportion of symptomatic and hospitalized cases averted as a function of the sensitivity and specificity of serological screening. Scenarios about the cost-effectiveness of screening and vaccination were chosen to be representative of Brazil and the Philippines. We found that public health impact depended primarily on sensitivity in high-transmission settings and on specificity in low-transmission settings. Cost-effectiveness could be achievable from the perspective of a public payer provided that sensitivity and the value of a disability-adjusted life-year were both high, but only in high-transmission settings. Requirements for reducing relative risk and achieving cost-effectiveness from an individual perspective were more restricted, due to the fact that those who test negative pay for screening but receive no benefit. Our results predict that cost-effectiveness could be achieved only in high-transmission areas of dengue-endemic countries with a relatively high per capita GDP, such as Panamá (13,680 USD), Brazil (8,649 USD), México (8,201 USD), or Thailand (5,807 USD). In conclusion, vaccination with CYD-TDV following serological screening could have a positive impact in some high-transmission settings, provided that screening is highly specific (to minimize individual harm), at least moderately sensitive (to maximize population benefit), and sufficiently inexpensive (depending on the setting).
    Sponsors
    GE, ACM, TWS, and TAP were supported by grant P01AI098670 (TWS, PI) from the National Institutes of Health, National Institute for Allergy and Infectious Disease.
    Keyword
    Computer Simulation
    Dengue Vaccine
    Dengue Virus
    Public Health--economics
    Identifier to cite or link to this item
    http://hdl.handle.net/10713/10266
    ae974a485f413a2113503eed53cd6c53
    10.1371/journal.pntd.0007482
    Scopus Count
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