What are interferons? How do interferons check the infection of new cells?
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Virus- infected cells secrete proteins called interferons, which protect non infectious cells from further viral infection .
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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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