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Contact tracing to control infectious disease: when enough is enough
Benjamin Armbruster1, Margaret L Brandeau
1Department of Management Science and Engineering, Stanford University, Stanford, CA 94305-4026, USA. armbruster@stanford.edu
Health Care Management Science
|December 14, 2007
Summary
Contact tracing is crucial for controlling infectious diseases like HIV and STDs. Our study shows diminishing returns on investment, guiding optimal resource allocation for effective disease control.
Area of Science:
- Public Health
- Epidemiology
- Health Economics
Background:
- Contact tracing is a key strategy for managing infectious diseases such as tuberculosis (TB), human immunodeficiency virus (HIV), and sexually transmitted diseases (STDs).
- Optimal investment levels for contact tracing interventions remain largely undetermined.
- Existing research has not fully explored the cost-effectiveness of varying contact tracing efforts.
Purpose of the Study:
- To develop and apply a methodology for determining the optimal investment in contact tracing.
- To evaluate the cost and effectiveness of different contact tracing investment levels using a simulation model.
- To inform public health policy regarding resource allocation for infectious disease control.
Main Methods:
- Development and application of a simulation model to analyze infectious disease spread within a network.
- Evaluation of cost-effectiveness by assessing disease prevalence reductions against investment levels.
- Analysis of budget allocation between contact tracing and different screening strategies (exogenous and endogenous infection).
Main Results:
- Contact tracing investments exhibit diminishing returns to scale, meaning increased spending yields progressively smaller reductions in disease prevalence.
- A cost-effectiveness threshold can be used to identify the optimal investment level for contact tracing.
- The model provides a framework for optimizing resource allocation between contact tracing and screening.
Conclusions:
- Simulation modeling offers a valuable policy tool for determining appropriate contact tracing investment for specific diseases and populations.
- Optimal investment in contact tracing is influenced by diminishing returns and cost-effectiveness thresholds.
- The methodology can be adapted for diseases like chlamydia to guide public health interventions.
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