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 cells during a viral infection that can protect other cells from further infection.

2. **Identifying the Immune Response**: The body's response to viral infections involves the innate immune system, which is present from birth. This system includes various mechanisms to protect the body from pathogens.

3. **Role of Cytokines**: During a viral infection, certain proteins known as cytokines are produced. These are signaling molecules that help modulate the immune response.

4. **Production of Interferons**: Among the cytokines, interferons are specifically produced in response to viral infections. Interferons are a type of antiviral protein that play a crucial role in the immune response.

5. **Function of Interferons**: Interferons do not directly kill virus-infected cells. Instead, they enhance the immune response and protect neighboring healthy cells from becoming infected by interfering with viral replication.

6. **Types of Interferons**: There are different types of interferons, including:
- Interferon alpha (produced by leukocytes)
- Interferon beta (produced by fibroblasts)
- Interferon gamma (produced by lymphocytes)

7. **Conclusion**: The substance that is produced by cells during a viral infection to protect other cells is interferon. Therefore, the correct answer to the question is "interferon."

**Final Answer**: Interferon

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