Accounting for imported cases in estimating the time-varying reproductive number of COVID-19 in Hong Kong.
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ABSTRACT: Estimating the time-varying reproductive number, Rt, is critical for monitoring transmissibility of an infectious disease. The impact of imported cases on the estimation is rarely explored. We developed a model to estimate separately the Rt for local cases and imported cases, with accounting for imperfect contact tracing of cases. We applied this framework to data on COVID-19 outbreaks in Hong Kong. The estimated Rt for local cases rise above 1 in late March, 2020, which was undetected by other commonly used methods. When imported cases accounted for a considerable proportion of all cases, their impact on estimating Rt is critical.
SUBMITTER: Tsang TK
PROVIDER: S-EPMC8244742 | biostudies-literature |
REPOSITORIES: biostudies-literature
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