What follow-up vaccines should a newborn of an HBsAg mother receive at 2 months and 4 months?

The correct follow-up vaccines for a newborn of a mother who is HBsAg-positive involves administering the hepatitis B vaccine at 2 months and 4 months of age. This schedule aligns with the recommendations for prevention of hepatitis B virus transmission from mother to child.

At birth, the newborn typically receives their first dose of the hepatitis B vaccine along with hepatitis B immunoglobulin (HBIG) to provide immediate protection against the virus. Following this initial dose, two additional doses of the hepatitis B vaccine are recommended to ensure adequate immune response and long-term protection. The second dose is given at 1-2 months of age, and the third dose should follow at 6-18 months.

By receiving the vaccine at 2 months and again at 4 months, the newborn is closely following the recommended immunization schedule, which is crucial for children at risk due to maternal hepatitis B positivity. This schedule helps ensure that the newborn is effectively protected against hepatitis B, reducing the risk of chronic infection and its associated complications later in life.