Free vaccines and DPT have their own advantages. The differences between the two are mainly reflected in the types of vaccines, the number of vaccinations and the costs. 1. Types of vaccines: Free vaccines include acellular pertussis vaccine, tetanus toxoid, diphtheria toxoid and inactivated polio vaccine. Pentavalent vaccine is a combination vaccine of the above four and Haemophilus influenzae type B. In addition to preventing the above four diseases, it can also prevent sepsis, pneumonia, meningitis, arthritis and other diseases caused by Haemophilus influenzae type B infection, which is a five-vaccine vaccine, which is one more vaccine than the free vaccine. Compared with the free vaccine, Pentavalent vaccine can prevent a wider range of diseases. 2. Frequency of vaccination: The free vaccine requires 12 vaccinations, while the Pentavalent vaccine requires 4 vaccinations. 3. Cost: In general, the free vaccine does not require payment, while the pentavalent vaccine is slightly more expensive and requires out-of-pocket payment. Overall, the Pentavalent vaccine prevents a wider range of diseases, requires fewer vaccinations, and is more convenient for parents; the disadvantage is that it is slightly more expensive and requires out-of-pocket expenses. The advantage of free vaccines is that they do not require out-of-pocket expenses, but the range of diseases prevented is smaller and the number of vaccinations is relatively higher. Parents are advised to consider this according to a combination of factors such as family financial situation, the child’s sensitivity to pain and parental time.