Which of the following properties of acquired immunity is the basis of vaccination?

Options

A. Specificity
B. Diversity
C. Memory
D. Discrimination between Self and Non-self

Answer

To solve the question, "Which of the following properties of acquired immunity is the basis of vaccination?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Acquired Immunity**: Acquired immunity is a specific immune response that develops after exposure to a pathogen. It involves the activation of lymphocytes (B cells and T cells) and the formation of antibodies.

2. **Identifying the Properties of Acquired Immunity**: The properties mentioned in the question are:
- Specificity
- Diversity
- Memory
- Discrimination between self and non-self

3. **Analyzing Each Property**:
- **Specificity**: This refers to the ability of antibodies to specifically target a particular antigen. While important, it does not directly relate to the concept of vaccination.
- **Diversity**: This property allows the immune system to recognize a wide variety of antigens. Again, while significant, it is not the main focus of vaccination.
- **Memory**: This is the ability of the immune system to remember past infections. Vaccination works by introducing a harmless form of the pathogen, which leads to the formation of memory cells. These cells "remember" the antigen and can mount a rapid response upon subsequent exposures.
- **Discrimination between self and non-self**: This property ensures that the immune system does not attack the body's own cells. While crucial for immune function, it is not the basis for vaccination.

4. **Conclusion**: The property of acquired immunity that is the basis of vaccination is **Memory**. Vaccination aims to create memory cells that will respond quickly to future infections by the same pathogen.

### Final Answer:
The basis of vaccination is the property of **Memory** in acquired immunity.

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