Japan has seen a surge in measles cases this year, with over 400 cases recorded since January, according to the Japan Institute for Health Security. Tokyo alone reported 211 cases, comprising nearly half of the national total, while the greater Tokyo metropolitan area, including neighboring prefectures, accounted for over 300 cases. The majority of measles patients were teenagers and individuals in their 20s, many of whom had incomplete vaccination records.
The institute highlighted that the highest number of measles cases in Japan over the past ten years was 744 in 2019. Measles is highly contagious, with a significant risk of infection for non-immune individuals exposed to the virus. Severe cases can result in complications like pneumonia and encephalitis. Despite being declared measles-free by the World Health Organization in 2015, Japan has witnessed a resurgence in measles cases since 2023, raising concerns about imported infections.
Emphasizing the importance of vaccination, the institute recommended two doses of the vaccine as the most effective preventive measure against measles and severe illness. Travelers heading to regions where measles is prevalent were advised to verify their vaccination status beforehand. Individuals displaying symptoms such as fever, rash, cough, or redness in the eyes were urged to consult medical facilities, disclosing any recent travel history or contact with infected persons.
