EL-METWALLY, Ashraf A. “Google Search Trend of Dengue Fever in Developing Countries in 2013-2014: An Internet-Based Analysis”. Journal of Health Informatics in Developing Countries 9, no. 1 (February 11, 2015). Accessed October 7, 2025. https://www.jhidc.org/index.php/jhidc/article/view/131.