Anti-tetanus serum (ATS), is an example of

Options

A. artificial passive immunity
B. natural passive immunity
C. artifical active immunity
D. natural active immunity

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about anti-tetanus serum (ATS) and what type of immunity it represents.

2. **Identifying Types of Immunity:**
There are four types of immunity mentioned:
- Artificial Passive Immunity
- Natural Passive Immunity
- Artificial Active Immunity
- Natural Active Immunity

3. **Defining Passive Immunity:**
Passive immunity occurs when pre-formed antibodies are introduced into the body. This means the body does not produce these antibodies; they are given from an external source.

4. **Defining Active Immunity:**
Active immunity occurs when the body is exposed to a pathogen (or its components) and produces its own antibodies in response. This can happen naturally (through infection) or artificially (through vaccination).

5. **Analyzing Anti-Tetanus Serum:**
Anti-tetanus serum contains pre-formed antibodies against the tetanus toxin. These antibodies are produced in another organism (like a horse) and then administered to a person to provide immediate protection against tetanus.

6. **Classifying Anti-Tetanus Serum:**
Since the anti-tetanus serum provides pre-formed antibodies from an external source, it falls under the category of passive immunity. Since these antibodies are artificially introduced into the body, it is classified as artificial passive immunity.

7. **Conclusion:**
Therefore, the correct answer to the question is that anti-tetanus serum (ATS) is an example of **Artificial Passive Immunity**.

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