Estimating the secondary attack rate and serial interval of influenza-like illnesses using social media

E. Yom-Tov,Ingemar Johansson-Cox,Vasileios Lampos,A. Hayward

Published 2015 in Influenza and Other Respiratory Viruses

ABSTRACT

Knowledge of the secondary attack rate (SAR) and serial interval (SI) of influenza is important for assessing the severity of seasonal epidemics of the virus. To date, such estimates have required extensive surveys of target populations. Here, we propose a method for estimating the intrafamily SAR and SI from postings on the Twitter social network. This estimate is derived from a large number of people reporting ILI symptoms in them and\or their immediate family members.

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