Hepatitis B vaccine is free for children, i.e. after the child is born, then 0, 1 and 6 months old like this, these three shots are free. If you are an adult or a child who has failed the vaccination, it is a fee to get the hepatitis B vaccine again. The current price of hepatitis B vaccine is a little more expensive than before. However, if you are negative for hepatitis B surface antibody, it is still recommended to actively get the hepatitis B vaccine, because after the hepatitis B vaccine, you have protective antibodies and it is safe to contact patients with hepatitis B. Be alert to the possibility of being infected. Now the country is very strict about the management of the vaccine, generally only some hospitals or CDC can be prescribed to play hepatitis B vaccine. The hepatitis B vaccine is a genetically synthesized vaccine, which is very safe and generally has no side effects, so you can be assured of the injection.