There is usually no significant difference between most childhood vaccines and adult vaccines, such as New Crown Vaccine, Rabies Vaccine, DPT Vaccine, MMR Vaccine, Encephalitis B Vaccine, Varicella Vaccine, etc. A small number of vaccines, such as HPV Vaccine, Influenza Vaccine, Hepatitis A Vaccine, Hepatitis B Vaccine, may differ in terms of vaccination dosage, number of vaccination, injection dose, and protective efficacy, as follows For example, HPV vaccine is divided into bivalent vaccine, quadrivalent vaccine and nine-valent vaccine. Our bivalent vaccine is suitable for women aged 9-45 years, quadrivalent vaccine is suitable for women aged 20-45 years, and nine-valent vaccine is suitable for women aged 16-26 years, so bivalent and nine-valent vaccines can be applied to children, while adults can be vaccinated with all three vaccines within the appropriate age; 2. The only difference between the children’s vaccine for hepatitis A and B and the adult vaccine is that the injected dose is different, and the dose for children is often less than the adult dose; 4.