However, Corporation officials denied there being any such glitch. “As there is shortage of vaccines, people are booking slots faster. Those who have booked their slots will be given doses without any delay,” said an official. Dr S Mahalakshmi, Additional City Health Officer of the Corporation, said the vaccines allotted by the State government were being given to both offline and online bookings for all age groups. “As many people walk in at the centres and hospitals, we have limited slots on the website. Once all the slots are booked, it closes automatically,” she said.