What is DPT vaccine? If you have not received the DPT vaccine, do you need to take it? In this regard, the following characteristics of DPT vaccine should be understood. First, the nature of the DPT vaccine, a class of vaccines A class of vaccines refers to the government to provide free of charge to the citizens, the citizens should be in accordance with the provisions of the government to be vaccinated. Citizens have the obligation to receive the first class vaccine, which is a mandatory vaccine. Don’t worry about the vaccine, do not give your baby vaccination. Otherwise, the baby will be defenseless against the corresponding infectious diseases. Inactivated Vaccine Inactivated vaccine is a specific method to make the virus lose its ability to grow and replicate in the human body, but still retains the characteristics sufficient to stimulate the protective response of the human immune system. Advantages are that they are stable, easy to store, and safer than live attenuated vaccines. The disadvantage is that multiple vaccinations are required to produce a good immune effect. Diseases that can be prevented Whooping cough, diphtheria, tetanus III. Vaccination procedure Basic immunization ① injection at 3 months of age ② injection at 4 months of age ③ injection at 5 months of age Booster immunization ④ injection at 18-24 months of age IV. Safety In recent years, acellular DPT vaccine has replaced the whole-cell vaccine, which has greatly improved the safety and lowered the rate of side-effects. DPT vaccination may cause minor side effects in a few babies, such as localized redness, swelling, hard nodules, fever, irritability and so on. The probability of adverse reactions increases with the fourth booster dose of DPT vaccine. 2~6% of the babies may have transient, benign, painless swelling, which may sometimes involve the whole vaccinated limb. The swelling can subside on its own without any sequelae, but the time of subsiding may be longer or shorter. Protection After completing 3 doses of basic immunization, 80-90% of them will produce protective power. Timely and full completion of 4 doses of DPT vaccination, the efficacy of prevention of typical pertussis is about 85%, the protective efficacy of tetanus is about 90%, and the protective efficacy of diphtheria is about 95% after 3 times of vaccination. The protective power produced can be maintained for at least 5-6 years. The vaccines currently used are acellular DPT vaccine and combined vaccine containing DPT components. The above vaccines can be used interchangeably and there is no significant difference in effectiveness. VII. Replacement Methods Those who have not completed the required number of doses of DPT vaccination will be operated in accordance with the specific provisions of the National Immunization Planning Vaccine Childhood Immunization Procedures (2016 Edition). Many developed countries will give another booster shot to adolescents in order to provide long-lasting protection for both adolescents and adults, although there is currently no specific recommended procedure in China. Low vaccine potency does not mean that the vaccination will not produce immunity, only that the protective antibodies produced are lower than normal. In summary, we should understand that: vaccination is always the best means of protecting health and we should still insist on vaccination; vaccines are the most favorable weapon for humans to fight against infectious diseases, and enough people are vaccinated in order to form a broad and powerful defense barrier; therefore, if you have not received the Para vaccine, it is recommended that you get a booster shot for your own situation.