The first clinical gene therapy was given in the year

Options

A. 1999
B. 1990
C. 2000
D. 2003

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the year when the first clinical gene therapy was administered.

2. **Identifying Key Information**: The first clinical gene therapy was conducted in the 1990s. It was specifically for a four-year-old child suffering from adenosine deaminase (ADA) deficiency.

3. **Understanding ADA Deficiency**: ADA deficiency is a condition that affects the immune system and can lead to severe combined immunodeficiency (SCID). This condition makes it difficult for the body to fight off infections.

4. **Recalling the Year**: The first clinical gene therapy was performed in 1990. This is the significant year when this groundbreaking therapy was administered.

5. **Selecting the Correct Answer**: Among the options provided (1999, 1990, 2000, 2003), the correct answer is 1990.

**Final Answer**: The first clinical gene therapy was given in the year **1990**.

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