Kolkata: Covid numbers on a roller-coaster ride. Be on your guard, say experts

Fresh Covid cases in Kolkata have been on a roller-coaster ride this week. While it saw a sharp jump to 81 from 54 between Tuesday and Wednesday, triggering fears of a surge following a period of restricted transmission since late-June during which positivity rate had dropped to just 1% in the state, on Thursday, it slid to 64. While Kolkata had no Covid death on Tuesday and Wednesday, three casualties were recorded on Thursday.