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Analysis of seasonality: number of weekly rotavirus gastroenteritis hospitalizations in children less than 5 years of age in (A) the period preceding universal rotavirus immunization (2008–2010), and (B) the period of universal vaccination period (2011–2013)* *Seasonality was analyzed using the observed weekly counts of RVGE cases in children less than 5 years of age. Each period included data for 3 years and 156 weeks.
