Recently, many young parents have been asking about vaccinations, when should they be given? What should I get? Are there some vaccines that should be given? At present, there are three types of vaccines in our country, one type of vaccine is the national mandatory vaccine, such as BCG, polio vaccine, polio vaccine, measles vaccine; the second type of vaccine is the recommended vaccine, such as chickenpox vaccine, mumps vaccine, etc.; the third type of vaccine is the voluntary vaccine, such as HIB, heptavalent pneumonia vaccine. Then a class I vaccine must be given if the baby has no contraindications, because it can prevent serious infectious diseases. Class I vaccines include free ones (domestic ones) and self-financed ones (imported ones). If the baby has good general condition, no obvious eczema, or no obvious allergies, he/she can be injected with free ones, but if the baby has obvious allergies, it is recommended to inject self-financed ones. The second type of vaccine, parents are advised to try to inject their babies, the third type of vaccine, depending on the situation, such as the baby’s physique is relatively good, that can be injected, this type of vaccine is more expensive, another example is the pneumonia vaccine, it does not mean that the vaccine will not pneumonia, the vaccine can only prevent several pneumonia, not all, if the baby’s physique is not good, it is recommended that before the pneumonia season can be injected such vaccine. Then when a class of vaccine is injected, generally the local epidemic prevention department will inform that the hepatitis B vaccine is injected after the full month. However, we often encounter the problem that the baby has a cold or diarrhea before the vaccination day, and if he/she is sick, he/she should wait until he/she is well before the injection. Pushing back the vaccine usually does not affect the immunization effect, but it should not be injected earlier.