Low, Constance, Koh Cheng Thoon, Raymond Lin, Ariel Chua, Pengiran Hishamuddin, Joanne Tay, and Jeffery Cutter. “Possible Nosocomial Transmission of Measles in Unvaccinated Children in a Singapore Public Hospital”. Western Pacific Surveillance and Response 3, no. 4 (May 30, 2013). Accessed November 21, 2024. https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/166.