Ozeki Y, et al. - Experts reviewed the seasonal variation of Kawasaki disease by an age-specific analysis. They analyzed data obtained from nationwide surveys of Kawasaki disease in Japan. In all age groups, a sharp increase was seen in winter, and it was notably sharper in the 1-year age group. They observed plateaus in disease occurrence in two periods: from March to May in the 2- to 4-year age group and from June to August in the 0- to 11-month age group.