**Core Concept**
Immunoglobulins, also known as antibodies, are proteins produced by the immune system to neutralize pathogens. In certain conditions, administering immunoglobulins can provide temporary protection against viral infections.

**Why the Correct Answer is Right**
The correct use of immunoglobulins in viral infections is in the context of post-exposure prophylaxis or treatment of severe immunodeficiency. This is typically seen in individuals with severe combined immunodeficiency (SCID) or those with compromised immune systems due to chemotherapy, HIV/AIDS, or other underlying conditions. Immunoglobulins can help bridge the gap in immune function, providing temporary protection against viral pathogens.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is vague and doesn't specify a condition where immunoglobulins are indicated.
* **Option B:** Immunoglobulins are not typically used as a primary treatment for viral infections in individuals with mild or moderate immunodeficiency.
* **Option D:** This option is incorrect as immunoglobulins are not used to treat viral infections in individuals with normal immune function.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize that immunoglobulins are not a substitute for vaccination. Vaccines provide long-term immunity, whereas immunoglobulins offer temporary protection.

**Correct Answer:** C.