Before revision:  Using daily COVID-19 notified cases from three states (Maharashtra, Delhi, and Telangana) and overall India, we assess the effect of current 21 days lock-down in terms of reduction cases and deaths. Lock-down effect is studied with different lock-down success rate. Our result suggest that 21 days lock-down will have no impact in Maharashtra and overall India. Furthermore, the presence of a higher percentage of COVID-19 super-spreaders will further deteriorate the situation in Maharashtra. However, for Tamil Nadu and Delhi there is some ray of hope as our prediction shows that lock-down will reduce a significant number of cases and deaths. in these two locations . Further extension of lock-down may place Delhi and Tamil Nadu in a comfort zone. Comparing estimated parameter samples for the mentioned four locations, we find a correlation between effect of lockdown and percentage of symptomatic infected in a region .
After revision:  Using daily COVID-19 notified cases from three states (Maharashtra, Delhi, and Telangana) and overall India, we estimated several epidemiologically important parameters as well as the basic reproduction number (R_{0 .