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Which of the following is the most accurate description of the role that interferons play in the immune defense system?

A. They act as an anaphylatoxin and chemoattractant for human neutrophils.
B. They act directly against viruses.
C. They induce the expression of antiviral proteins in adjacent uninfected cells.
D. They induce the synthesis of interferon in adjacent uninfected cells.
E. They stimulate the division of B cells.

C.

Option C (They induce the expression of antiviral proteins in adjacent uninfected cells) is correct. Interferons have antiviral effects, but these effects are indirect. Interferons in infected cells act by inducing antiviral proteins in adjacent uninfected cells. This stimulates antiviral activity in the adjacent cells but does not stimulate interferon synthesis in them. In addition to their antiviral activities, interferons have antitumor activities. They also activate specific immune cells

yep C...