Omicron is three times as infectious as Delta and "war rooms" are needed to contain it, the Centre has told states. It listed a series of prevention and containment measures that included extensive testing, night curfew and regulation of gatherings. The Parliament passed the Election Laws (Amendment) Bill, 2021, with Rajya Sabha approving it through voice vote amid a walkout by the Opposition. The Bill seeks to link electoral rolls with the Aadhaar ecosystem to weed out duplication of voters and weed out fake votes.