Does your child have all their vaccines yet? Immunizations are usually given to children when they are toddlers and school age. The type of immunization also varies, depending on the age of the child. It’s important to pay attention to what types of immunizations should be given to children according to their age. And this is because there are several immunizations whose names sound the same, but have different functions. For example, there is the diphtheria vaccination or Dt immunization (DTaP), and the Td (Tdap) immunization. What is the difference between the two?