The disease AIDS results in the drastic decrease in the immunity of the affected person. Explain the mechanism involved.

Explanation

### Step-by-Step Solution:

1. **Understanding Immunity**:
- Immunity is the body's ability to fight off infections and diseases caused by microorganisms. The cells responsible for immunity are known as white blood cells (WBCs).

2. **Role of White Blood Cells**:
- Among the WBCs, lymphocytes play a crucial role in the immune response. They are primarily responsible for identifying and attacking pathogens.

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