Immunity acquired after an infection is

Options

A. Active immunity
B. passive immunity
C. Innate immunity
D. Both 2 and 3

Answer

To answer the question "Immunity acquired after an infection is:", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Immunity**:
- Immunity can be classified into several types: innate immunity, active immunity, passive immunity, and sometimes both.

2. **Define Innate Immunity**:
- Innate immunity is the body's first line of defense that is present at birth. It is not acquired through exposure to pathogens or infections. Therefore, it cannot be the answer to the question.

3. **Define Passive Immunity**:
- Passive immunity involves the transfer of antibodies from one individual to another. This can occur naturally (e.g., from mother to child through breast milk) or artificially (e.g., through antibody injections). This type of immunity does not involve the body generating its own immune response to an infection, so it is not the correct answer.

4. **Define Active Immunity**:
- Active immunity is the immunity that develops as a result of exposure to an infection or through vaccination. When the body encounters a pathogen, it produces its own antibodies and memory cells, which provide long-term protection against future infections from the same pathogen.

5. **Conclusion**:
- Since the question specifically asks about immunity acquired after an infection, the correct answer is **active immunity**.

### Final Answer:
Immunity acquired after an infection is **active immunity**.

---