Social & Preventive Medicine All are true about newly introduced Td vaccine in place of TT vaccine except:- A First dose should be given at 3 years of age B Dose 0.5ml/IM/Upper arm C Shake test applicable D Open l policy is applicable for Td vaccine 💡 Explanation All are true about newly introduced Td vaccine in place of TT vaccine except:- ✓ Correct Answer: A. First dose should be given at 3 years of age