All DDEs and DDEs (Dist. & Zones) are directed to open temporary immunization centres for students in the age group of 15-18 years in 20 schools where school health clinics operate, the Directorate of Education (DOE) said in an order. The Delhi government has directed to open temporary immunization centres for 15–18-year-olds in 20 of its schools, where health clinics are running. The vaccination campaign for children of the age group started on 3 January.