Question
How long can the first dose of the Hepatitis B vaccine for newborns be delayed after full moon?
Answer
If a newborn has already received the Hepatitis B vaccine at birth, it is generally recommended to administer the second dose at one month to prevent Hepatitis B virus infection. If the vaccine was administered late at birth, it is important to wait a month before administering the second dose. If the vaccine was administered on time at birth, delaying the second dose by more than a week may affect the vaccine’s effectiveness.