Uddin, M. N. ., Parvez, S. M. ., Ali, H. M. S. ., Samsuddin, M. ., & Karim, A. R. . (2022). Mathematical modeling on the transmission of COVID-19 and its reproduction numbers in SAARC countries. Journal of Applied and Natural Science, 14(2), 469–476. https://doi.org/10.31018/jans.v14i2.3398