Norovirus disease surveillance using Google Internet query share data.

Desai, Rishi; Hall, Aron J; Lopman, Benjamin A; Shimshoni, Yair; Rennick, Marcus; Efron, Niv; Matias, Yossi; Patel, Manish M et al. · Clin Infect Dis · 2012

cross_sectional · Level IV

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Abstract

Google Internet query share (IQS) data for gastroenteritis-related search terms correlated strongly with contemporaneous national (R(2) = 0.70) and regional (R(2) = 0.74) norovirus surveillance data in the United States. IQS data may facilitate rapid identification of norovirus season onset, elevated peak activity, and potential emergence of novel strains.

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