Scores of people above 45 who turned up at vaccination centres in Salt Lake, Narayanpur, Rajarhat and nearby areas for their shots, returned home without getting the jabs because they had not pre-booked slots on the CoWin portal.
Authorities of the vaccination centres said they had no provision to register them on the spot.
From Thursday, anyone aged 45 or above could get a Covid shot. Till Wednesday, senior citizens and people between 45 and 59 with comorbidities were eligible for vaccine doses.
Several private hospitals and vaccine sites run by the Calcutta Municipal Corporation said they recorded a recipient’s personal details and administered the shot. A CMC official said they had directed all their vaccination centre personnel to not turn anyone away.