What's the use of children's health handbook? Is it necessary to get a vaccine? Do I have to record it on every vaccination?

Children's health handbook for general physical examination and children's vaccination certificate for vaccination. At work, we also found that in some areas, children's physical examination and vaccination are all in the same book, which means that there are records of physical examination and vaccination in the children's health manual. If you are not sure, you'd better bring your child's information.