Vaccine against leprosy has been developed in

Options

A. 1984
B. 1989
C. 1993
D. 1997

Answer

### Step-by-Step Solution:

1. **Understanding Leprosy**:
- Leprosy is an infectious disease caused by the bacterium Mycobacterium leprae. It primarily affects the skin, eyes, and nose, leading to various symptoms.

2. **Identifying the Symptoms**:
- Common symptoms of leprosy include light-colored or red skin patches with reduced sensation and weakness in the hands and feet.

3. **Vaccine Development**:
- A vaccine against leprosy has been developed to stimulate the immune system to combat the Mycobacterium leprae bacterium.

4. **Location of Development**:
- The vaccine was developed and approved at the National Institute of Immunology.

5. **Year of Introduction**:
- The vaccine was introduced in the year 1997.

6. **Conclusion**:
- Therefore, the correct answer to the question regarding where the vaccine against leprosy has been developed is the National Institute of Immunology.

### Final Answer:
The vaccine against leprosy has been developed at the National Institute of Immunology.

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