Butta R, Butta S, Gupta MK. Understanding the second wave of epidemics using the susceptible-infectious-recovered model. Int J Res Med Sci [Internet]. 2021 Jul. 28 [cited 2023 Mar. 28];9(8):2452-4. Available from: https://www.msjonline.org/index.php/ijrms/article/view/9884