The vaccine drive for the 18+ was stopped due to an insufficient supply of the vaccinations. There was excess demand and not enough vaccines to support these drives. Now, they are focusing on vaccinating the 45+ population in totality.
The government has extended the time interval between the two doses of vaccine from six weeks to eight weeks for the 45+ age category. In the interim, the government has asked to increase the production of vaccines and meet the demand with sufficient supply. Once this is achieved, the vaccination drive for 18+ age categories will be reopened.