Erondu, Ngozi, and Ulla K. Griffiths. “Evaluating Cost and Performance for Improved Meningitis Disease Surveillance in Chad”. Online Journal of Public Health Informatics 7, no. 1 (February 26, 2015). Accessed January 24, 2022. https://ojphi.org/ojs/index.php/ojphi/article/view/5738.