Over 13.21 lakh children in the age group of 12 to 14 years will be administered COVID-19 vaccine in Chhattisgarh in a drive that begins on Wednesday, an official from the state health department said on Tuesday. All the necessary preparations have been made to administer Corbevax vaccine to 13,21,286 children in the age group, said Dr Priyanka Shukla, the state nodal officer for COVID-19 vaccination and director of National Health Mission.