Prof. Taniguchi’s column was published in the “Gendai no Kotoba” column of the evening edition of the Kyoto Shimbun on January 31, 2022. The title of the column is “Omicron and Math“. In this column, Prof. Taniguchi introduces the SIR model as a mathematical model to explain or predict the number of cases of infectious diseases such as the new coronavirus. I hope you will read this article.