COVID-19 in Indian Population: Plausible Transition from Protective Immunity to Herd Immunity.

COVID-19 is fast spreading around the globe in a highly contagious manner. Until date there are no therapeutic agents/vaccines developed which could control this highly infectious virus from spreading among human population. Our earlier studies showed that implementation of prolonged lockdown had a profound effect on the rate of spread of COVID-19 in the population. The observed increase in doubling time of COVID-19 with a high recovery rate following complete Lockdown reflected that protective immunity was present against the virus among the population. In this article the data from three months post completion of Lockdown, that is during the month of September, 2020 was considered and results reflected that a significant down trend in the rate of COVID-19 with recovery reaching up to 69% of the affected cases of COVID-19 by September 30, 2020. The projection made of the data, up to 30 November, 2020, pointed towards continued decrease in active cases of COVID-19 and the recovery reaching to ~90% at present. The significance of all the data in controlling COVID-19 is discussed