Td vaccine contains of tetanus toxoid and diphtheria toxoid, but the concentration of diphtheria antigen is lower than that in DPT, DT or Pentavalent etc.
• Td vaccine is sensitive to both freezing and heat.
• It is WHO prequalified
• Open vial policy is applicable to Td vaccine.
• Shake test valid for testing for any damage by accidental freezing
• Td vaccine is safe even for use in the pregnant women