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Simulation-free estimation of an individual-based SEIR model for evaluating nonpharmaceutical interventions with an application to COVID-19 in the District of Columbia
Journal article   Open access   Peer reviewed

Simulation-free estimation of an individual-based SEIR model for evaluating nonpharmaceutical interventions with an application to COVID-19 in the District of Columbia

Daniel K Sewell, Aaron Miller and CDC MInD-Healthcare Program
PloS one, Vol.15(11), pp.e0241949-e0241949
2020
DOI: 10.1371/journal.pone.0241949
PMCID: PMC7654811
PMID: 33170871
url
https://doi.org/10.1371/journal.pone.0241949View
Published (Version of record) Open Access

Abstract

The ongoing COVID-19 pandemic has overwhelmingly demonstrated the need to accurately evaluate the effects of implementing new or altering existing nonpharmaceutical interventions. Since these interventions applied at the societal level cannot be evaluated through traditional experimental means, public health officials and other decision makers must rely on statistical and mathematical epidemiological models. Nonpharmaceutical interventions are typically focused on contacts between members of a population, and yet most epidemiological models rely on homogeneous mixing which has repeatedly been shown to be an unrealistic representation of contact patterns. An alternative approach is individual based models (IBMs), but these are often time intensive and computationally expensive to implement, requiring a high degree of expertise and computational resources. More often, decision makers need to know the effects of potential public policy decisions in a very short time window using limited resources. This paper presents a computation algorithm for an IBM designed to evaluate nonpharmaceutical interventions. By utilizing recursive relationships, our method can quickly compute the expected epidemiological outcomes even for large populations based on any arbitrary contact network. We utilize our methods to evaluate the effects of various mitigation measures in the District of Columbia, USA, at various times and to various degrees. Rcode for our method is provided in the supplementry material, thereby allowing others to utilize our approach for other regions.
Algorithms Betacoronavirus - isolation & purification Coronavirus Infections - diagnosis Coronavirus Infections - epidemiology Coronavirus Infections - prevention & control Coronavirus Infections - virology COVID-19 Disease Outbreaks District of Columbia - epidemiology Humans Masks Models, Theoretical Pandemics - prevention & control Pneumonia, Viral - diagnosis Pneumonia, Viral - epidemiology Pneumonia, Viral - prevention & control Pneumonia, Viral - virology Quarantine SARS-CoV-2

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