**Core Concept**
The question tests the understanding of vaccination timing in relation to splenectomy, focusing on the immune response to capsulated organisms. Vaccines against capsulated bacteria, such as *Streptococcus pneumoniae*, *Haemophilus influenzae* type b, and *Neisseria meningitidis*, are crucial for individuals undergoing splenectomy due to the increased risk of infections from these organisms.

**Why the Correct Answer is Right**
The correct timing for vaccination against capsulated organisms before splenectomy is generally recommended to be at least 2 weeks before the procedure. This allows sufficient time for the development of an immune response. The vaccines stimulate the production of antibodies against the capsulated bacteria, which is essential for protection against these pathogens, especially in the absence of the spleen, an organ critical for filtering the blood and removing encapsulated bacteria.

**Why Each Wrong Option is Incorrect**
**Option A:** Too short a period for adequate immune response development.
**Option C:** Too long and not typically recommended.
**Option D:** Not a standard recommendation.

**Clinical Pearl / High-Yield Fact**
It's crucial to vaccinate patients against capsulated organisms before splenectomy to prevent overwhelming post-splenectomy infection (OPSI), a potentially life-threatening condition. The timing of vaccination is key to ensuring the patient has developed adequate immunity.

**Correct Answer:** B. 2 weeks.