In order to minimise errors and the subsequent inconvenience caused to the citizens for online appointments for vaccination, the government is introducing a new feature of "four digit security code" in the CoWIN application from Saturday (May 8).

In a statement, the Union Health Ministry said, "It has been noticed in some instances that citizens that had booked their appointment for Covid-19 vaccination through the CoWIN portal, but did not actually go for vaccination on the scheduled date, have received notification through SMS that a vaccine dose has been administered to them.