Akpan, G., and Y. 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), Vol. 1, no. 1, Jan. 2025, pp. 13-18, http://ojs.mediu.edu.my/index.php/IJCCR/article/view/5624.