Papers › Estimating the household secondary attack rate with the Incomplete Chain Binomial model
Estimating the household secondary attack rate with the Incomplete Chain Binomial model
Jonas Christoffer Lindstrøm, Terese Bekkevold, Cathinka Halle Julin, Anna Hayman Robertson, Lisbeth Meyer Næss
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The Secondary Attack Rate (SAR) is a measure of how infectious a communicable disease is, and is often estimated based on studies of disease transmission in households. The Chain Binomial model is a simple model for disease outbreaks, and the final size distribution derived from it can be used to estimate the SAR using simple summary statistics. The final size distribution of the Chain Binomial model assume that the outbreaks have concluded, which in some instances may require long follow-up time. We develop a way to compute the probability distribution of the number of infected before the outbreak has concluded, which we call the Incomplete Chain Binomial distribution. We study a few theoretical properties of the model. We develop Maximum Likelihood estimation routines for inference on the SAR and explore the model by analyzing two real world data sets.
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