Additional file 1 of Correlation between national surveillance and search engine query data on respiratory syncytial virus infections in Japan

Additional file 1. Relative search volume on Google Trends and sentinel surveillance data for 2018, 2019, 2020, and 2021 were shown in the supplementary data. The Google Trends data and surveillance data were available from January 1, 2018, to November 14, 2021, and from February 26, 2018, to September 12, 2021. The sentinel surveillance data were expressed as the number of laboratory-confirmed cases per sentinel site. NA: not available.