The substance produced by a cell in viral infection that can protect other cells from further infection is

Options

A. serotonin
B. colostrum
C. interferon
D. histamine

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a substance produced by a cell during a viral infection that protects other cells from further infection.

2. **Identifying the Options**: The options provided are:
- A. Serotonin
- B. Cholesterol
- C. Interferon
- D. Histamine

3. **Analyzing Each Option**:
- **Serotonin**: This is a neurotransmitter primarily involved in mood regulation and does not play a role in viral infections.
- **Cholesterol**: This is a lipid molecule important for cell membrane structure and does not have a protective role against viral infections.
- **Interferon**: This is a group of signaling proteins produced by the immune system in response to viral infections. They help protect neighboring cells from being infected by viruses.
- **Histamine**: This is a compound involved in local immune responses and inflammation but does not specifically protect against viral infections.

4. **Conclusion**: The substance that is produced by cells during a viral infection and protects other cells from further infection is **Interferon**.

5. **Final Answer**: The correct option is **C. Interferon**.

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