Which of the following does not provide long term immunity?

Options

A. Naturally acquired active immunity
B. Artificially acquired active immunity
C. Artificially acquired passive immunity
D. All of the above

Answer

To determine which option does not provide long-term immunity, we can analyze the different types of immunity mentioned in the question.

### Step-by-Step Solution:

1. **Understand the Types of Immunity**:
- **Naturally Acquired Active Immunity**: This occurs when a person is exposed to a pathogen naturally (e.g., through infection) and their immune system responds by producing antibodies. This type of immunity is long-lasting because the immune system retains memory cells that can respond quickly upon re-exposure to the same pathogen.

2. **Evaluate Artificially Acquired Active Immunity**:
- **Artificially Acquired Active Immunity**: This type is achieved through vaccination, where antigens are introduced into the body to stimulate an immune response. Similar to naturally acquired active immunity, this also leads to the formation of memory cells, providing long-term immunity.

3. **Analyze Artificially Acquired Passive Immunity**:
- **Artificially Acquired Passive Immunity**: This involves the direct injection of antibodies into a person, providing immediate but temporary protection against pathogens. Since the body does not produce its own antibodies or memory cells in this case, the immunity is not long-lasting.

4. **Conclusion**:
- After analyzing the three types of immunity, we conclude that **artificially acquired passive immunity** does not provide long-term immunity. Therefore, the answer to the question is option C: **artificially acquired passive immunity**.

### Final Answer:
**Option C: Artificially acquired passive immunity does not provide long-term immunity.**

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