What are interferons? How do interferons check infection of new cells?

Explanation

### Step-by-Step Solution:

1. **Definition of Interferons**:
- Interferons are glycoproteins produced by the body in response to viral infections. They are part of the immune response and play a crucial role in the body's defense against viruses.

2. **Role of Interferons in Innate Immunity**:
- Interferons are considered a component of the innate immune system. They form a cytokine barrier that helps protect the body from viral infections.

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