Name the type of human cell HIV attacks on its entry into the body. Explain the events that occur in the cell which further lead to cause immuno deficinency syndrome.

Explanation

### Step-by-Step Solution:

1. **Identify the Target Cell**:
The type of human cell that HIV attacks upon entering the body is primarily the **helper T-cells (CD4+ T-lymphocytes)**. Additionally, HIV can also infect macrophages.

2. **Entry of HIV**:
Once HIV enters the body, it attaches to the surface of the helper T-cells or macrophages using its envelope proteins, particularly the gp120 protein, which binds to the CD4 receptor on these cells.

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