Question
What are the effects of administering the second dose of the Hepatitis A vaccine for children early?
Answer
The Hepatitis A vaccine is not a blood product. Currently, the inactivated hepatitis A vaccine is recommended for two doses to achieve lifelong immunity. The complete vaccine course for hepatitis A involves two doses: one for the initial immunization and another to be administered within 6-12 months to enhance immune response. There are two types of hepatitis A vaccines: one is attenuated and requires only one injection, while the other is inactivated and requires two injections. Generally, two doses of hepatitis A vaccine are administered, and it is appropriate to administer them a few days earlier if needed, but it is not necessary to give a third dose. However, receiving a third dose can produce a peak antibody level.