Question

What are interferons and how do the check infection of cells?

Answer 1

Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of several pathogens, such as viruses, bacteria, parasites, and also tumor cells. ... Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections.

Answer 2

Answer-

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Interferons are a group of natural proteins released by the host cell in the presence of any virus, tumour cells and parasites etc.

Interferons check infection of new cells as:

1. Interferons inhibit viral replication within the host cells.

2. Which in turn activates the natural killer cells and macrophages .

3. This increases the presentation of antigens to lymphocytes.

4. Now, these antigens multiply and remove the pathogen.

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