Five people died after a fire broke out at vaccine-maker Serum Institute of India's Pune facility; the BSE Sensex ended nearly 200 points lower, after crossing the 50,000 milestone in the morning session, due to panic-selling in the last hour of trade on reports of a fire at the Serum Institute; the Reserve Bank of India said worst is over for India's economy and policymakers may soon have more room to support a recovery; Prime Minister Narendra Modi and all Chief Ministers, MPs and MLAs above 50 will be vaccinated in the second phase of Covid inoculation drive; protests broke out in Arunachal Pradesh's Upper Subansiri District following reports of China having constructed a new village on a territory that is part of the state; and other top news of the day.