**Core Concept**
Hepatitis C is a viral infection that causes liver inflammation, and treatment options vary depending on the age and health status of the individual. In pediatric patients, especially those under 12 years old, treatment aims to prevent chronic infection and minimize liver damage.

**Why the Correct Answer is Right**
Interferon, specifically pegylated interferon, has been the primary treatment for chronic hepatitis C in children. It works by boosting the body's immune response to fight the virus. Interferon-alpha has been shown to decrease viral load, reduce liver inflammation, and improve liver function in children with hepatitis C. Pegylation of interferon allows for slower release and increased efficacy. The combination of interferon-alpha and ribavirin was a standard treatment for pediatric patients with chronic hepatitis C, although treatment regimens may vary depending on the patient's age, viral genotype, and other factors.

**Why Each Wrong Option is Incorrect**
**Option A:** Vaccines are not available for hepatitis C, as the virus is highly mutable and the immune response is not sufficient to prevent infection. Hepatitis C vaccination is still a topic of research.
**Option C:** Gamma-globulin is an immunoglobulin preparation used to provide temporary immunity against specific infections, such as hepatitis A. It has no role in the treatment of hepatitis C.
**Option D:** Corticosteroids are not indicated in the treatment of hepatitis C, as they may worsen liver inflammation and have no antiviral effects.

**Clinical Pearl / High-Yield Fact**
In pediatric patients with hepatitis C, early treatment initiation is crucial to prevent chronic infection and minimize liver damage. Treatment should be individualized based on the patient's age, viral genotype, and other factors, and should be conducted under the guidance of a hepatologist or a pediatric gastroenterologist.

✓ Correct Answer: B. Interferon