The COVID-19 vaccination drive for people in the age group of 18 to 44 years in Tripura is likely to be delayed as the vaccine manufacturer has not yet assured supply of doses on time, a senior health department official said on Saturday. National Health Mission (NHM) Director Dr Siddharth Shiv Jaiswal said that the state government is fully prepared to start the vaccination programme scheduled on May 1 but the vaccine manufacturer is yet to confirm the dates for supply of the doses. We are in constant touch with the vaccine manufacturer, but they are yet to confirm the exact date of supply of doses. They informed us that the vaccine will be delivered to Maharashtra first as the situation is grave there and then they would consider supplying vaccines to Tripura , he told reporters.