Chaos unfolded at some vaccination centres in Noida today as people queued up to get their Covid shots. Hundreds gathered at the District Government Hospital in Sector 30. Hospital authorities say the confusion is because people in the age group of 18-45 arrived at the hospital after online registration while there aren't much slots. Only 200 slots for 18-45 age group were available today and around 400 for those above 45 years of age is the target, say hospital officials.