DantuluriLohithaDivya Vani, Dr.YogeshSantoba Nagargoje, Dr.AditiVivek Rangari,Dr.AjithBabu Poovathingal,Dr.Ravichandra Ravi,Dr. Sunil Kumar Gulia, Dr.Amruta.C. Naik, “COVID 2020 versus COVID 2021-A Data Base Research”, Annals of RSCB, vol. 25, no. 6, pp. 10802–10806, Jun. 2021.