Analyzing epidemiological trends in second and third waves of COVID-19 variants in IndiaKushagra Agarwal, Subrata Ghosh, Nita Parekh and Chittaranjan HensEur. Phys. J. Spec. Top., (2024) 1-12DOI: https://doi.org/10.1140/epjs/s11734-024-01331-y