Vaccination against small pox means the introduction into our body, of

Options

A. Lecucoytes obtained from animals
B. Antibodies produced in other animal
C. Antibodies
D. Attenuated smallpoz virus

Answer

**Step-by-Step Solution:**

1. **Understanding Vaccination**: Vaccination is the process of introducing a substance into the body to stimulate the immune system. This substance is typically a weakened, killed, or attenuated form of a pathogen (virus or bacteria).

2. **Identifying the Purpose of Vaccination**: The main purpose of vaccination is to prepare the immune system to recognize and combat the actual pathogen if encountered in the future. This helps in developing immunity against diseases.

3. **Focusing on Smallpox**: Smallpox is a viral disease caused by the variola virus. The vaccine for smallpox was developed by Edward Jenner in the late 18th century.

4. **Examining the Options**:
- **Leukocytes obtained from animals**: This is incorrect. Vaccination does not involve the introduction of white blood cells.
- **Antibodies produced in other animals**: This is also incorrect. This refers to passive immunity, not vaccination.
- **Antibodies**: This is incorrect as well. Antibodies are not introduced through vaccination.
- **Attenuated smallpox virus**: This is correct. Vaccination against smallpox involves the introduction of a weakened or attenuated form of the variola virus.

5. **Conclusion**: The correct answer to the question is that vaccination against smallpox means the introduction into our body of the attenuated smallpox virus.

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