**Question:** After administering a live vaccine, immunoglobulins are given after-

A. 24 hours
B. 48 hours
C. 72 hours
D. 7 days

**Core Concept:** Live vaccines are biologically active forms of pathogens, which stimulate the immune system to produce specific antibodies against the pathogen. Immunoglobulins are proteins produced by the immune system to neutralize and eliminate pathogens.

**Why the Correct Answer is Right:** Immunoglobulins, also known as antibodies, are produced by the immune system in response to the presence of antigens (foreign substances) in the body. In the case of live vaccines, the antigens are present in their live form, which prompts the production of immunoglobulins, such as IgM and IgG, within a few days after vaccination.

**Why Each Wrong Option is Incorrect:**

A. 24 hours: This is too soon for the immune system to produce significant amounts of immunoglobulins in response to a live vaccine.
B. 48 hours: While the immune response starts within hours after vaccination, it typically takes a few days for the production of immunoglobulins to reach a peak.
C. 72 hours: Similar to Option B, the production of immunoglobulins peaks within a few days after vaccination.
D. 7 days: The production of immunoglobulins continues after vaccination, but the peak response occurs within the first week, and it may take several weeks for the immune response to wane.

**Clinical Pearl:** Vaccination is a crucial component of preventing infectious diseases. Live vaccines, especially, stimulate a robust immune response, including the production of immunoglobulins, which contribute to herd immunity by protecting not only the vaccinated individual but also the vulnerable population.

**Correct Answer:** D. 7 days

**Why the Correct Answer is Right:** As mentioned earlier, the production of immunoglobulins peaks within the first week after vaccination, and it may take several weeks for the immune response to wane. In this case, the correct answer is D, as the production of immunoglobulins reaches its maximum within the first week.

**Why Each Wrong Option is Incorrect:**

A. 24 hours: This is too soon for the immune system to produce significant amounts of immunoglobulins in response to a live vaccine.
B. 48 hours: While the immune response starts within hours after vaccination, it typically takes a few days for the production of immunoglobulins to reach a peak.
C. 72 hours: Similar to Option B, the production of immunoglobulins peaks within a few days after vaccination.