Gunaratnam P, Massey P, Durrheim D, Torvaldsen S. Invasive meningococcal disease in elderly people, New South Wales, Australia, 1993 to 2012. Western Pac Surveill Response J [Internet]. 2013 Dec. 9 [cited 2024 Apr. 29];4(4). Available from: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/218