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A Methodological Framework for Economic Evaluation of Operational Response to Vector-Borne Diseases Based on Early Warning Systems

Yesim TozanSchool of Global Public Health, New York University, New York, New York;

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Maquines Odhiambo SeweDepartment of Public Health and Clinical Medicine, Epidemiology and Global Health & Umeå Centre for Global Health Research, Umeå University, Umeå, Sweden;

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Sooyoung KimSchool of Global Public Health, New York University, New York, New York;

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Joacim RocklövDepartment of Public Health and Clinical Medicine, Epidemiology and Global Health & Umeå Centre for Global Health Research, Umeå University, Umeå, Sweden;
Heidelberg Institute of Global Health, Interdisciplinary Centre for Scientific Computing, Heidelberg University, Heidelberg, Germany

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ABSTRACT.

Despite significant advances in improving the predictive models for vector-borne diseases, only a few countries have integrated an early warning system (EWS) with predictive and response capabilities into their disease surveillance systems. The limited understanding of forecast performance and uncertainties by decision-makers is one of the primary factors that precludes its operationalization in preparedness and response planning. Further, predictive models exhibit a decrease in forecast skill with longer lead times, a trade-off between forecast accuracy and timeliness and effectiveness of action. This study presents a methodological framework to evaluate the economic value of EWS-triggered responses from the health system perspective. Assuming an operational EWS in place, the framework makes explicit the trade-offs between forecast accuracy, timeliness of action, effectiveness of response, and costs, and uses the net benefit analysis, which measures the benefits of taking action minus the associated costs. Uncertainty in disease forecasts and other parameters is accounted for through probabilistic sensitivity analysis. The output is the probability distribution of the net benefit estimates at given forecast lead times. A non-negative net benefit and the probability of yielding such are considered a general signal that the EWS-triggered response at a given lead time is economically viable. In summary, the proposed framework translates uncertainties associated with disease forecasts and other parameters into decision uncertainty by quantifying the economic risk associated with operational response to vector-borne disease events of potential importance predicted by an EWS. The goal is to facilitate a more informed and transparent public health decision-making under uncertainty.

Author Notes

Address correspondence to Yesim Tozan, School of Global Public Health, New York University, 708 Broadway, New York, NY 10003. E-mail: tozan@nyu.edu

Authors’ addresses: Yesim Tozan and Sooyoung Kim, School of Global Public Health, New York University, New York, NY, E-mails: tozan@nyu.edu and sk9076@nyu.edu. Maquines Sewe, Department of Public Health and Clinical Medicine, Epidemiology and Global Health & Umea○ Centre for Global Health Research, Umea○ University, Umea○, Sweden, E-mail: maquines.sewe@umu.se. Joacim Rocklöv, Department of Public Health and Clinical Medicine, Epidemiology and Global Health & Umea○ Centre for Global Health Research, Umea○ University, Umea○, Sweden, and Heidelberg Institute of Global Health, Interdisciplinary Centre for Scientific Computing, Heidelberg University, Heidelberg, Germany, E-mail: joacim.rockloev@uni-heidelberg.de.

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