Full immunization against tetanus can last for 5 to 10 years; without full immunization, the effect will last less than 5 years. Full immunization, which requires four injections, can last about 5 to 10 years. If the full immunization is not completed and the vaccine is not given according to the requirements, the duration of action will be shorter, less than 5 years. Pertussis vaccine is a combined vaccine against pertussis, diphtheria and tetanus. It is intended for children between the ages of 3 months and 6 years, and is usually given in three injections between the ages of 3 months and 12 months, with an interval of 4 to 6 weeks between each two injections, and can be reinforced with a fourth injection at the age of 1.5 to 2 years. People suffering from central nervous system diseases, people with past medical history, and people with allergies cannot receive this vaccine, and vaccination should be postponed during the acute attacks of fever, acute diseases and chronic mental diseases. It is recommended to receive DPT vaccine under the guidance of doctors in regular hospitals to avoid discomfort.