Tetanus (lockjaw) and diphtheria are serious diseases. Tetanus is caused by a germ that enters the body through a cut or wound. Tetanus causes serious, painful spasms of all muscles. It can lead to "locking" of the jaw or an inability to open your mouth or to swallow.
Diphtheria causes a thick coating in the nose, throat, or airway. It can lead to breathing problems, heart failure, paralysis, and death. Diphtheria spreads when germs pass from an infected person to the nose or throat of others.
Vaccination is the best way to protect against tetanus and diphtheria. 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 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.
Contact the pharmacy to arrange for your immunization.
Reference: CDC