Expand the term SCID.

Explanation

### Step-by-Step Text Solution:

1. **Identify the Acronym**: The first step is to recognize that SCID is an acronym that stands for a specific medical condition.

2. **Expand the Acronym**: The next step is to expand SCID into its full form. SCID stands for "Severe Combined Immunodeficiency Disease."

3. **Understand the Condition**: It is important to understand what Severe Combined Immunodeficiency Disease entails. This condition is characterized by the absence or severe deficiency of both B-cells and T-cells, which are crucial components of the immune system.

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