Step 1: Understanding BCG Vaccine.
The BCG (Bacillus Calmette-Guérin) vaccine is primarily used to prevent tuberculosis (TB), an infectious disease that mainly affects the lungs but can also impact other parts of the body. The BCG vaccine is based on a weakened strain of the Mycobacterium bovis, which is related to the bacterium that causes TB.
Step 2: Use of BCG Vaccine.
This vaccine is commonly administered to infants in many countries to prevent severe forms of TB, including TB meningitis and disseminated TB. It is particularly important in regions where TB is prevalent.
Step 3: Why not other options?
- (A) Jaundice: Jaundice is a symptom of liver disease, not a disease that can be prevented by BCG.
- (B) Polio: Polio is prevented by the Polio vaccine, not BCG.
- (C) Mumps: Mumps is prevented by the MMR (Measles, Mumps, Rubella) vaccine.
Step 4: Conclusion.
The BCG vaccine is used to prevent tuberculosis, making option (D) the correct answer.