Updated Jan 03, 2021 | 15:15 IST Till date, the strain of Covid has been found in one passenger. But there is alarm over KMC's inability to track 20 passengers. Kolkata municipality unable to track more than 20 UK passengers | Image for representation   |  Photo Credit: ANI Kolkata: One more passenger who returned to the state from foreign lands has tested positive for Covid. This takes the number of Covid patients under the radar for carrying the UK strain to three. As of Sunday, the strain of Covid has been found in one passenger. But there is an alarm over the civic body’s inability to track 20 passengers who arrived by the same flight as the one with the fresh, more infectious strain. 7 others have left their addresses in the city and gone somewhere else.