## **Core Concept**
The prevention of mother-to-child transmission of hepatitis B involves interrupting the transmission of the virus from the mother to the newborn. This requires a combination of measures that include immunoprophylaxis.

## **Why the Correct Answer is Right**
The correct approach for preventing mother-to-child transmission of hepatitis B includes administering **hepatitis B immune globulin (HBIG)** and the **first dose of hepatitis B vaccine** within 12 hours of birth. HBIG provides immediate, temporary protection against hepatitis B, while the hepatitis B vaccine initiates active immunity. This combination is crucial for newborns of HBsAg-positive mothers to prevent perinatal transmission of hepatitis B virus.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not specify the administration of HBIG, which is essential for immediate protection against hepatitis B.
- **Option B:** This option is incorrect as it only mentions the hepatitis B vaccine without HBIG, which would not provide immediate protection against hepatitis B.
- **Option C:** This option might seem partially correct but is incorrect if it implies that only one of these measures is sufficient or if it lacks the specification of HBIG and the first dose of vaccine.
- **Option D:** Without specifying the correct regimen that includes both HBIG and the hepatitis B vaccine, this option is incorrect.

## **Clinical Pearl / High-Yield Fact**
A crucial point to remember is that for newborns of HBsAg-positive mothers, the administration of **HBIG and the first dose of hepatitis B vaccine within 12 hours of life** is a critical preventive measure. This approach significantly reduces the risk of mother-to-child transmission of hepatitis B.

## **Correct Answer:** D. Hepatitis B immune globulin and hepatitis B vaccine.