Serum Institute of India CEO, Adar Poonawalla, told NDTV that if trials in India and UK are complete, Covid vaccine could be available for use by January next year; Air Pollution increases Covid deaths by 17 per cent, a study claims; Bihar today voted for the first phase of assembly elections; PM calls Tejashwi Yadav "Jungle Raj Ke Yuvraj"; Minister Nitin Gadkari's meltdown viral; prominent Kashmir NGOs raided by NIA and other top news of the day.