[Comment] India's COVID-19 vaccination drive: key challenges and resolutions

India has been gravely struck by the second wave of COVID-191 caused by SARS-CoV-2, and is predicted to be hit by the third wave in the next few months. It is challenging for the Government of India to implement a mass vaccination drive while mitigating the subsequent COVID-19 waves. Recommendations for the second wave of COVID-19 in India have been described elsewhere.2 Here, we highlight challenges and resolution measures for mass vaccination of the second-most populous country in the world.