Akpan, Godwin, and Yazeed Al Moaiad. “Enhancing Early Warning Systems for Vaccine-Preventable Diseases in Africa through IDSR, Electronic Active Surveillance and Big Data Analytics”. International Journal on Contemporary Computer Research (IJCCR) 1, no. 1 (January 3, 2025): 13-18. Accessed September 29, 2025. http://ojs.mediu.edu.my/index.php/IJCCR/article/view/5624.