Graphical Overview of Infectious Diseases

　※The aggregated weekly number of cases reported in the National Surveillance System of Infectious Diseases is used. The latest data for epidemiological week 2 are as of January 14, 2026, and data from previous weeks have been republished.
　※The shaded area shows the baseline range. The lower bound is the five-year average for each epidemiological week computed over a centered 7-week window, and the upper bound is the same average plus 2 SD. Both bounds were subsequently smoothed using a moving-average filter. For COVID-19, the baseline range was calculated using data from the past two years.