alamsyah, agus, Ikhtiaruddin, Muhammadiah, Rajunitrigo Rajunitrigo, and Nyimas Octa Elsa Aditia. “Descriptive Epidemiological Study and Death Risk Factors for Coronavirus Disease 2019 (Covid-19) in Riau Province”. Jurnal kesehatan komunitas (Journal of community health) 9, no. 1 (April 9, 2023): 104–114. Accessed April 28, 2024. https://jurnal.htp.ac.id/index.php/keskom/article/view/1429.