The BJP's promise for free coronavirus vaccine in Bihar's election manifesto has snowballed into a controversy, with opposition parties questioning how a life-saving vaccine can be used to get political mileage in elections; Tamil Nadu has become the second state to promise free vaccine to residents once it is manufactured; the Madhya Pradesh government has decided to approach the Supreme Court against the decision of the High Court to restrict physical political rallies in nine districts amid the pandemic after the Election Commission said political parties are flouting guidelines with impunity; PM Modi inaugurated Durga Puja pandals in Kolkata via video conferencing as the five-day celebrations begin in West Bengal amid the pandemic; the new sero survey in Tamil Nadu's Chennai has revealed that nearly one-third of population has been exposed to the coronavirus while an overall positivity rate of 32.3 per cent has been recorded; Maharashtra has withdrawn the general consent it extended to the CBI to conduct probes after the agency filed a case to investigate the ratings scam in the state; and other top news of the day.