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Virus-infected cells secrete proteins that protect neighbouring cells. These are:

AHistamines
BAntitoxins
CInterferons
DAntibodies
Answer & Solution
Correct answer: C. Interferons
1. This is the cytokine barrier of innate immunity. 2. The proteins are interferons. 3. They protect non-infected cells. _Source: syllabus Biology, Chapter 8, Human Health and Disease._
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