The first type of vaccine is a vaccine that must be vaccinated by the country according to the current domestic disease epidemic situation and the general physical condition of children in our country. The vaccination fee is paid by the government, while other vaccines that do not belong to the first type of vaccine and require parents to pay for it belong to the second type of vaccine. 
The pentavalent vaccine of Class II vaccine can prevent some diseases covered by class I vaccine. Therefore, the number of vaccinations can be reduced.
 parents generally believe that the second type of vaccine only prevents diseases other than the first type of vaccine.