Passive immunity is ____________.

Options

A. Acquired through natural overt or latent infection
B. Acquired through Vaccination
C. Acquired through readymade antibodies
D. Acquired by activating immune system of the body

Answer

**Step-by-Step Solution:**

1. **Definition of Immunity**: Start by understanding what immunity is. Immunity refers to the ability of an organism to resist disease-causing microorganisms and pathogens.

2. **Understanding Passive Immunity**: Passive immunity is a type of immunity that is acquired when ready-made antibodies are introduced into the body. This means that the body does not have to produce these antibodies on its own.

3. **Sources of Passive Immunity**:
- **Natural Sources**: One way passive immunity is acquired is through natural means, such as when a mother transfers antibodies to her infant through colostrum (the first milk produced after childbirth).
- **Artificial Sources**: Passive immunity can also be acquired artificially by administering ready-made antibodies, such as in the case of antivenom for snake bites.

4. **Key Characteristics**:
- In passive immunity, the individual does not produce their own antibodies; they receive them from an external source.
- This type of immunity provides immediate protection but is temporary, as the antibodies will eventually degrade and not be replenished by the body.

5. **Examples of Passive Immunity**:
- **Colostrum**: The yellowish fluid secreted by the mother during the first few days of lactation that contains antibodies.
- **Antivenom**: A treatment for snake bites that contains antibodies against snake venom.

6. **Conclusion**: Therefore, passive immunity is defined as the immunity acquired through the introduction of ready-made antibodies, either naturally or artificially.

**Final Answer**: Passive immunity is acquired through the introduction of ready-made antibodies.

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