Which is introduced during small pox vaccination ?

Options

A. Antibodies
B. Leucocytes
C. Antibiotics
D. Attenuated virus

Answer

**Step-by-Step Solution:**

1. **Understanding Smallpox**: Smallpox is a serious viral disease caused by the variola virus. It has been eradicated due to successful vaccination programs.

2. **Purpose of Vaccination**: Vaccination is a method used to induce immunity in an individual against specific diseases. It involves the introduction of a vaccine into the body.

3. **Components of the Smallpox Vaccine**: The smallpox vaccine is specifically prepared from an attenuated (weakened) form of the variola virus. This means that the virus is not capable of causing disease but is still able to stimulate the immune system.

4. **Immune Response**: When the attenuated virus is introduced into the body, it triggers the immune system to produce antibodies. These antibodies help protect the body from future infections by the actual variola virus.

5. **Evaluating Options**:
- **Antibodies**: These are produced as a result of vaccination but are not what is introduced during vaccination.
- **Leukocytes**: These are white blood cells that are already present in the body and are involved in the immune response but are not the agents introduced during vaccination.
- **Antibiotics**: These are medications used to treat bacterial infections, not relevant to viral infections like smallpox.
- **Attenuated Virus**: This is the correct answer as it refers to the weakened form of the virus that is introduced during smallpox vaccination to stimulate an immune response.

6. **Conclusion**: The component introduced during smallpox vaccination is the attenuated virus.

**Final Answer**: Attenuated virus.

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