- Japan reported 236 confirmed measles cases from January to 08 Apr 2026, representing a 3.6-fold increase compared to 66 confirmed measles cases recorded during the same period in 2025.
- Tokyo had documented 109 cases by 13 Apr 2026, with 55 cases occurring in April alone; as of 08 Apr 2026, Tokyo had 72 cases—the cumulative total increased by 37 cases in just five days.
- Nationwide, the first 100 cases were reported by 08 Mar 2026, while the subsequent ~136 cases occurred over the following four weeks, indicating an acceleration in transmission.
- The majority of patients in Tokyo are aged 10–39 years.
Measles spread quickly and can be dangerous - protection is simple: get vaccinated!
Swiss recommendations: All persons born after 1963 who have no documented protection against the infection (antibodies or 2 documented vaccinations) should be vaccinated twice with MMR vaccine at one month interval. In the event of an epidemic in the region or contact with a measles case, vaccination is recommended from the age of 6 months.