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© Research
Publication : American journal of epidemiology

A new framework and software to estimate time-varying reproduction numbers during epidemics

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in American journal of epidemiology - 15 Sep 2013

Cori A, Ferguson NM, Fraser C, Cauchemez S

Link to Pubmed [PMID] – 24043437

Am. J. Epidemiol. 2013 Nov;178(9):1505-12

The quantification of transmissibility during epidemics is essential to designing and adjusting public health responses. Transmissibility can be measured by the reproduction number R, the average number of secondary cases caused by an infected individual. Several methods have been proposed to estimate R over the course of an epidemic; however, they are usually difficult to implement for people without a strong background in statistical modeling. Here, we present a ready-to-use tool for estimating R from incidence time series, which is implemented in popular software including Microsoft Excel (Microsoft Corporation, Redmond, Washington). This tool produces novel, statistically robust analytical estimates of R and incorporates uncertainty in the distribution of the serial interval (the time between the onset of symptoms in a primary case and the onset of symptoms in secondary cases). We applied the method to 5 historical outbreaks; the resulting estimates of R are consistent with those presented in the literature. This tool should help epidemiologists quantify temporal changes in the transmission intensity of future epidemics by using surveillance data.

https://www.ncbi.nlm.nih.gov/pubmed/24043437