Analysis of the second wave of COVID-19 in India based on SEIR model R. Gopal, V. K. Chandrasekar and M. Lakshmanan Eur. Phys. J. Spec. Top., 231 18-20 (2022) 3453-3460 Published online: 13 January 2022 DOI: 10.1140/epjs/s11734-022-00426-8