Td is made for people 7 years of age and older. People who have not gotten at least 3 doses of any tetanus and diphtheria vaccine (DTP, DTaP or DT) during their lifetime should do so using Td. After a person gets the third dose, a Td dose is needed every 10 years all through life. Other vaccines may be given at the same time as Td. Tell you doctor or nurse if the person getting the vaccine has ever had a serious allergic reaction or other problem after getting DTP, DTaP or DT, now has moderate or severe illness or is pregnant. If you are not sure, ask your doctor or nurse.