Griffith, Matthew M., Munehisa Fukusumi, Yusuke Kobayashi, Yusuke Matsui, Shingo Nishiki, Reiko Shimbashi, Saeko Morino, Tomimasa Sunagawa, Keiko Taya, Tamano Matsui, and Kazunori Oishi. “Epidemiology of Vaccine-Preventable Diseases in Japan: Considerations for Pre-Travel Advice for the 2019 Rugby World Cup and 2020 Summer Olympic and Paralympic Games”. Western Pacific Surveillance and Response 9, no. 2 (July 4, 2018). Accessed April 19, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/575.