Katayama Y, Kiyohara K, Komukai S, et al. - Researchers conducted a retrospective observational study for a period of 3 years between January 2015 and December 2017 in order to determine the correlation between the incidence of rotavirus infections and the number of telephone triages for linked symptoms in pediatric patients under 4 years old in Osaka prefecture, Japan. During the study period, 102,336 patients with rotavirus were assessed, and 123,720 individuals were triaged by telephone. In the regression model with the number of telephone triages for “stomachache + nausea/vomiting” and “stomachache + diarrhea + nausea/vomiting”, the highest correlation coefficient of 0.921 was estimated. These findings support a positive relation of the number of telephone triage symptoms with the incidence of pediatric patients with rotavirus in a large metropolitan area of Japan.